21791280

素因数分解:

$2^4\times 3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{109}}^1$

素因数の和:156

約数の個数: 240

約数和(自身を含む): 83967840

約数和(自身を除く): 62176560

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 17, 20, 21, 24, 28, 30, 34, 35, 40, 42, 48, 49, 51, 56, 60, 68, 70, 80, 84, 85, 98, 102, 105, 109, 112, 119, 120, 136, 140, 147, 168, 170, 196, 204, 210, 218, 238, 240, 245, 255, 272, 280, 294, 327, 336, 340, 357, 392, 408, 420, 436, 476, 490, 510, 545, 560, 588, 595, 654, 680, 714, 735, 763, 784, 816, 833, 840, 872, 952, 980, 1020, 1090, 1176, 1190, 1308, 1360, 1428, 1470, 1526, 1635, 1666, 1680, 1744, 1785, 1853, 1904, 1960, 2040, 2180, 2289, 2352, 2380, 2499, 2616, 2856, 2940, 3052, 3270, 3332, 3570, 3706, 3815, 3920, 4080, 4165, 4360, 4578, 4760, 4998, 5232, 5341, 5559, 5712, 5880, 6104, 6540, 6664, 7140, 7412, 7630, 8330, 8720, 9156, 9265, 9520, 9996, 10682, 11118, 11445, 11760, 12208, 12495, 12971, 13080, 13328, 14280, 14824, 15260, 16023, 16660, 18312, 18530, 19992, 21364, 22236, 22890, 24990, 25942, 26160, 26705, 27795, 28560, 29648, 30520, 32046, 33320, 36624, 37060, 38913, 39984, 42728, 44472, 45780, 49980, 51884, 53410, 55590, 61040, 64092, 64855, 66640, 74120, 77826, 80115, 85456, 88944, 90797, 91560, 99960, 103768, 106820, 111180, 128184, 129710, 148240, 155652, 160230, 181594, 183120, 194565, 199920, 207536, 213640, 222360, 256368, 259420, 272391, 311304, 320460, 363188, 389130, 427280, 444720, 453985, 518840, 544782, 622608, 640920, 726376, 778260, 907970, 1037680, 1089564, 1281840, 1361955, 1452752, 1556520, 1815940, 2179128, 2723910, 3113040, 3631880, 4358256, 5447820, 7263760, 10895640, 21791280]

約数ペア:

[(1, 21791280), (2, 10895640), (3, 7263760), (4, 5447820), (5, 4358256), (6, 3631880), (7, 3113040), (8, 2723910), (10, 2179128), (12, 1815940), (14, 1556520), (15, 1452752), (16, 1361955), (17, 1281840), (20, 1089564), (21, 1037680), (24, 907970), (28, 778260), (30, 726376), (34, 640920), (35, 622608), (40, 544782), (42, 518840), (48, 453985), (49, 444720), (51, 427280), (56, 389130), (60, 363188), (68, 320460), (70, 311304), (80, 272391), (84, 259420), (85, 256368), (98, 222360), (102, 213640), (105, 207536), (109, 199920), (112, 194565), (119, 183120), (120, 181594), (136, 160230), (140, 155652), (147, 148240), (168, 129710), (170, 128184), (196, 111180), (204, 106820), (210, 103768), (218, 99960), (238, 91560), (240, 90797), (245, 88944), (255, 85456), (272, 80115), (280, 77826), (294, 74120), (327, 66640), (336, 64855), (340, 64092), (357, 61040), (392, 55590), (408, 53410), (420, 51884), (436, 49980), (476, 45780), (490, 44472), (510, 42728), (545, 39984), (560, 38913), (588, 37060), (595, 36624), (654, 33320), (680, 32046), (714, 30520), (735, 29648), (763, 28560), (784, 27795), (816, 26705), (833, 26160), (840, 25942), (872, 24990), (952, 22890), (980, 22236), (1020, 21364), (1090, 19992), (1176, 18530), (1190, 18312), (1308, 16660), (1360, 16023), (1428, 15260), (1470, 14824), (1526, 14280), (1635, 13328), (1666, 13080), (1680, 12971), (1744, 12495), (1785, 12208), (1853, 11760), (1904, 11445), (1960, 11118), (2040, 10682), (2180, 9996), (2289, 9520), (2352, 9265), (2380, 9156), (2499, 8720), (2616, 8330), (2856, 7630), (2940, 7412), (3052, 7140), (3270, 6664), (3332, 6540), (3570, 6104), (3706, 5880), (3815, 5712), (3920, 5559), (4080, 5341), (4165, 5232), (4360, 4998), (4578, 4760)]