20981268

素因数分解:

$2^2\times 3^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^2$

素因数の和:92

約数の個数: 180

約数和(自身を含む): 70822752

約数和(自身を除く): 49841484

約数列:

[1, 2, 3, 4, 6, 7, 9, 11, 12, 14, 18, 21, 22, 27, 28, 29, 33, 36, 42, 44, 54, 58, 63, 66, 77, 81, 84, 87, 99, 108, 116, 126, 132, 154, 162, 174, 189, 198, 203, 231, 252, 261, 297, 308, 319, 324, 348, 378, 396, 406, 462, 522, 567, 594, 609, 638, 693, 756, 783, 812, 841, 891, 924, 957, 1044, 1134, 1188, 1218, 1276, 1386, 1566, 1682, 1782, 1827, 1914, 2079, 2233, 2268, 2349, 2436, 2523, 2772, 2871, 3132, 3364, 3564, 3654, 3828, 4158, 4466, 4698, 5046, 5481, 5742, 5887, 6237, 6699, 7308, 7569, 8316, 8613, 8932, 9251, 9396, 10092, 10962, 11484, 11774, 12474, 13398, 15138, 16443, 17226, 17661, 18502, 20097, 21924, 22707, 23548, 24948, 25839, 26796, 27753, 30276, 32886, 34452, 35322, 37004, 40194, 45414, 51678, 52983, 55506, 60291, 64757, 65772, 68121, 70644, 80388, 83259, 90828, 103356, 105966, 111012, 120582, 129514, 136242, 158949, 166518, 180873, 194271, 211932, 241164, 249777, 259028, 272484, 317898, 333036, 361746, 388542, 476847, 499554, 582813, 635796, 723492, 749331, 777084, 953694, 999108, 1165626, 1498662, 1748439, 1907388, 2331252, 2997324, 3496878, 5245317, 6993756, 10490634, 20981268]

約数ペア:

[(1, 20981268), (2, 10490634), (3, 6993756), (4, 5245317), (6, 3496878), (7, 2997324), (9, 2331252), (11, 1907388), (12, 1748439), (14, 1498662), (18, 1165626), (21, 999108), (22, 953694), (27, 777084), (28, 749331), (29, 723492), (33, 635796), (36, 582813), (42, 499554), (44, 476847), (54, 388542), (58, 361746), (63, 333036), (66, 317898), (77, 272484), (81, 259028), (84, 249777), (87, 241164), (99, 211932), (108, 194271), (116, 180873), (126, 166518), (132, 158949), (154, 136242), (162, 129514), (174, 120582), (189, 111012), (198, 105966), (203, 103356), (231, 90828), (252, 83259), (261, 80388), (297, 70644), (308, 68121), (319, 65772), (324, 64757), (348, 60291), (378, 55506), (396, 52983), (406, 51678), (462, 45414), (522, 40194), (567, 37004), (594, 35322), (609, 34452), (638, 32886), (693, 30276), (756, 27753), (783, 26796), (812, 25839), (841, 24948), (891, 23548), (924, 22707), (957, 21924), (1044, 20097), (1134, 18502), (1188, 17661), (1218, 17226), (1276, 16443), (1386, 15138), (1566, 13398), (1682, 12474), (1782, 11774), (1827, 11484), (1914, 10962), (2079, 10092), (2233, 9396), (2268, 9251), (2349, 8932), (2436, 8613), (2523, 8316), (2772, 7569), (2871, 7308), (3132, 6699), (3364, 6237), (3564, 5887), (3654, 5742), (3828, 5481), (4158, 5046), (4466, 4698)]