21015720

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1$

素因数の和:121

約数の個数: 256

約数和(自身を含む): 80352000

約数和(自身を除く): 59336280

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 18, 20, 22, 24, 27, 29, 30, 33, 36, 40, 44, 45, 54, 55, 58, 60, 61, 66, 72, 87, 88, 90, 99, 108, 110, 116, 120, 122, 132, 135, 145, 165, 174, 180, 183, 198, 216, 220, 232, 244, 261, 264, 270, 290, 297, 305, 319, 330, 348, 360, 366, 396, 435, 440, 488, 495, 522, 540, 549, 580, 594, 610, 638, 660, 671, 696, 732, 783, 792, 870, 915, 957, 990, 1044, 1080, 1098, 1160, 1188, 1220, 1276, 1305, 1320, 1342, 1464, 1485, 1566, 1595, 1647, 1740, 1769, 1830, 1914, 1980, 2013, 2088, 2196, 2376, 2440, 2552, 2610, 2684, 2745, 2871, 2970, 3132, 3190, 3294, 3355, 3480, 3538, 3660, 3828, 3915, 3960, 4026, 4392, 4785, 5220, 5307, 5368, 5490, 5742, 5940, 6039, 6264, 6380, 6588, 6710, 7076, 7320, 7656, 7830, 8052, 8235, 8613, 8845, 9570, 10065, 10440, 10614, 10980, 11484, 11880, 12078, 12760, 13176, 13420, 14152, 14355, 15660, 15921, 16104, 16470, 17226, 17690, 18117, 19140, 19459, 20130, 21228, 21960, 22968, 24156, 26535, 26840, 28710, 30195, 31320, 31842, 32940, 34452, 35380, 36234, 38280, 38918, 40260, 42456, 43065, 47763, 48312, 53070, 57420, 58377, 60390, 63684, 65880, 68904, 70760, 72468, 77836, 79605, 80520, 86130, 90585, 95526, 97295, 106140, 114840, 116754, 120780, 127368, 144936, 155672, 159210, 172260, 175131, 181170, 191052, 194590, 212280, 233508, 238815, 241560, 291885, 318420, 344520, 350262, 362340, 382104, 389180, 467016, 477630, 525393, 583770, 636840, 700524, 724680, 778360, 875655, 955260, 1050786, 1167540, 1401048, 1751310, 1910520, 2101572, 2335080, 2626965, 3502620, 4203144, 5253930, 7005240, 10507860, 21015720]

約数ペア:

[(1, 21015720), (2, 10507860), (3, 7005240), (4, 5253930), (5, 4203144), (6, 3502620), (8, 2626965), (9, 2335080), (10, 2101572), (11, 1910520), (12, 1751310), (15, 1401048), (18, 1167540), (20, 1050786), (22, 955260), (24, 875655), (27, 778360), (29, 724680), (30, 700524), (33, 636840), (36, 583770), (40, 525393), (44, 477630), (45, 467016), (54, 389180), (55, 382104), (58, 362340), (60, 350262), (61, 344520), (66, 318420), (72, 291885), (87, 241560), (88, 238815), (90, 233508), (99, 212280), (108, 194590), (110, 191052), (116, 181170), (120, 175131), (122, 172260), (132, 159210), (135, 155672), (145, 144936), (165, 127368), (174, 120780), (180, 116754), (183, 114840), (198, 106140), (216, 97295), (220, 95526), (232, 90585), (244, 86130), (261, 80520), (264, 79605), (270, 77836), (290, 72468), (297, 70760), (305, 68904), (319, 65880), (330, 63684), (348, 60390), (360, 58377), (366, 57420), (396, 53070), (435, 48312), (440, 47763), (488, 43065), (495, 42456), (522, 40260), (540, 38918), (549, 38280), (580, 36234), (594, 35380), (610, 34452), (638, 32940), (660, 31842), (671, 31320), (696, 30195), (732, 28710), (783, 26840), (792, 26535), (870, 24156), (915, 22968), (957, 21960), (990, 21228), (1044, 20130), (1080, 19459), (1098, 19140), (1160, 18117), (1188, 17690), (1220, 17226), (1276, 16470), (1305, 16104), (1320, 15921), (1342, 15660), (1464, 14355), (1485, 14152), (1566, 13420), (1595, 13176), (1647, 12760), (1740, 12078), (1769, 11880), (1830, 11484), (1914, 10980), (1980, 10614), (2013, 10440), (2088, 10065), (2196, 9570), (2376, 8845), (2440, 8613), (2552, 8235), (2610, 8052), (2684, 7830), (2745, 7656), (2871, 7320), (2970, 7076), (3132, 6710), (3190, 6588), (3294, 6380), (3355, 6264), (3480, 6039), (3538, 5940), (3660, 5742), (3828, 5490), (3915, 5368), (3960, 5307), (4026, 5220), (4392, 4785)]