20805960

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1$

素因数の和:116

約数の個数: 256

約数和(自身を含む): 79626240

約数和(自身を除く): 58820280

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 17, 20, 21, 24, 28, 30, 31, 34, 35, 40, 42, 47, 51, 56, 60, 62, 68, 70, 84, 85, 93, 94, 102, 105, 119, 120, 124, 136, 140, 141, 155, 168, 170, 186, 188, 204, 210, 217, 235, 238, 248, 255, 280, 282, 310, 329, 340, 357, 372, 376, 408, 420, 434, 465, 470, 476, 510, 527, 564, 595, 620, 651, 658, 680, 705, 714, 744, 799, 840, 868, 930, 940, 952, 987, 1020, 1054, 1085, 1128, 1190, 1240, 1302, 1316, 1410, 1428, 1457, 1581, 1598, 1645, 1736, 1785, 1860, 1880, 1974, 2040, 2108, 2170, 2380, 2397, 2604, 2632, 2635, 2820, 2856, 2914, 3162, 3196, 3255, 3290, 3570, 3689, 3720, 3948, 3995, 4216, 4340, 4371, 4760, 4794, 4935, 5208, 5270, 5593, 5640, 5828, 6324, 6392, 6510, 6580, 7140, 7285, 7378, 7896, 7905, 7990, 8680, 8742, 9588, 9870, 10199, 10540, 11067, 11186, 11656, 11985, 12648, 13020, 13160, 14280, 14570, 14756, 15810, 15980, 16779, 17484, 18445, 19176, 19740, 20398, 21080, 21855, 22134, 22372, 23970, 24769, 26040, 27965, 29140, 29512, 30597, 31620, 31960, 33558, 34968, 36890, 39480, 40796, 43710, 44268, 44744, 47940, 49538, 50995, 55335, 55930, 58280, 61194, 63240, 67116, 73780, 74307, 81592, 83895, 87420, 88536, 95880, 99076, 101990, 110670, 111860, 122388, 123845, 134232, 147560, 148614, 152985, 167790, 173383, 174840, 198152, 203980, 221340, 223720, 244776, 247690, 297228, 305970, 335580, 346766, 371535, 407960, 442680, 495380, 520149, 594456, 611940, 671160, 693532, 743070, 866915, 990760, 1040298, 1223880, 1387064, 1486140, 1733830, 2080596, 2600745, 2972280, 3467660, 4161192, 5201490, 6935320, 10402980, 20805960]

約数ペア:

[(1, 20805960), (2, 10402980), (3, 6935320), (4, 5201490), (5, 4161192), (6, 3467660), (7, 2972280), (8, 2600745), (10, 2080596), (12, 1733830), (14, 1486140), (15, 1387064), (17, 1223880), (20, 1040298), (21, 990760), (24, 866915), (28, 743070), (30, 693532), (31, 671160), (34, 611940), (35, 594456), (40, 520149), (42, 495380), (47, 442680), (51, 407960), (56, 371535), (60, 346766), (62, 335580), (68, 305970), (70, 297228), (84, 247690), (85, 244776), (93, 223720), (94, 221340), (102, 203980), (105, 198152), (119, 174840), (120, 173383), (124, 167790), (136, 152985), (140, 148614), (141, 147560), (155, 134232), (168, 123845), (170, 122388), (186, 111860), (188, 110670), (204, 101990), (210, 99076), (217, 95880), (235, 88536), (238, 87420), (248, 83895), (255, 81592), (280, 74307), (282, 73780), (310, 67116), (329, 63240), (340, 61194), (357, 58280), (372, 55930), (376, 55335), (408, 50995), (420, 49538), (434, 47940), (465, 44744), (470, 44268), (476, 43710), (510, 40796), (527, 39480), (564, 36890), (595, 34968), (620, 33558), (651, 31960), (658, 31620), (680, 30597), (705, 29512), (714, 29140), (744, 27965), (799, 26040), (840, 24769), (868, 23970), (930, 22372), (940, 22134), (952, 21855), (987, 21080), (1020, 20398), (1054, 19740), (1085, 19176), (1128, 18445), (1190, 17484), (1240, 16779), (1302, 15980), (1316, 15810), (1410, 14756), (1428, 14570), (1457, 14280), (1581, 13160), (1598, 13020), (1645, 12648), (1736, 11985), (1785, 11656), (1860, 11186), (1880, 11067), (1974, 10540), (2040, 10199), (2108, 9870), (2170, 9588), (2380, 8742), (2397, 8680), (2604, 7990), (2632, 7905), (2635, 7896), (2820, 7378), (2856, 7285), (2914, 7140), (3162, 6580), (3196, 6510), (3255, 6392), (3290, 6324), (3570, 5828), (3689, 5640), (3720, 5593), (3948, 5270), (3995, 5208), (4216, 4935), (4340, 4794), (4371, 4760)]