21129368

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1$

素因数の和:109

約数の個数: 96

約数和(自身を含む): 48997200

約数和(自身を除く): 27867832

約数列:

[1, 2, 4, 8, 13, 17, 19, 26, 34, 37, 38, 52, 68, 74, 76, 104, 136, 148, 152, 221, 247, 289, 296, 323, 442, 481, 494, 578, 629, 646, 703, 884, 962, 988, 1156, 1258, 1292, 1406, 1768, 1924, 1976, 2312, 2516, 2584, 2812, 3757, 3848, 4199, 5032, 5491, 5624, 7514, 8177, 8398, 9139, 10693, 10982, 11951, 15028, 16354, 16796, 18278, 21386, 21964, 23902, 30056, 32708, 33592, 36556, 42772, 43928, 47804, 65416, 71383, 73112, 85544, 95608, 139009, 142766, 155363, 203167, 278018, 285532, 310726, 406334, 556036, 571064, 621452, 812668, 1112072, 1242904, 1625336, 2641171, 5282342, 10564684, 21129368]

約数ペア:

[(1, 21129368), (2, 10564684), (4, 5282342), (8, 2641171), (13, 1625336), (17, 1242904), (19, 1112072), (26, 812668), (34, 621452), (37, 571064), (38, 556036), (52, 406334), (68, 310726), (74, 285532), (76, 278018), (104, 203167), (136, 155363), (148, 142766), (152, 139009), (221, 95608), (247, 85544), (289, 73112), (296, 71383), (323, 65416), (442, 47804), (481, 43928), (494, 42772), (578, 36556), (629, 33592), (646, 32708), (703, 30056), (884, 23902), (962, 21964), (988, 21386), (1156, 18278), (1258, 16796), (1292, 16354), (1406, 15028), (1768, 11951), (1924, 10982), (1976, 10693), (2312, 9139), (2516, 8398), (2584, 8177), (2812, 7514), (3757, 5624), (3848, 5491), (4199, 5032)]