21387184

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{397}}^1$

素因数の和:462

約数の個数: 80

約数和(自身を含む): 52510528

約数和(自身を除く): 31123344

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 37, 52, 56, 74, 91, 104, 112, 148, 182, 208, 259, 296, 364, 397, 481, 518, 592, 728, 794, 962, 1036, 1456, 1588, 1924, 2072, 2779, 3176, 3367, 3848, 4144, 5161, 5558, 6352, 6734, 7696, 10322, 11116, 13468, 14689, 20644, 22232, 26936, 29378, 36127, 41288, 44464, 53872, 58756, 72254, 82576, 102823, 117512, 144508, 190957, 205646, 235024, 289016, 381914, 411292, 578032, 763828, 822584, 1336699, 1527656, 1645168, 2673398, 3055312, 5346796, 10693592, 21387184]

約数ペア:

[(1, 21387184), (2, 10693592), (4, 5346796), (7, 3055312), (8, 2673398), (13, 1645168), (14, 1527656), (16, 1336699), (26, 822584), (28, 763828), (37, 578032), (52, 411292), (56, 381914), (74, 289016), (91, 235024), (104, 205646), (112, 190957), (148, 144508), (182, 117512), (208, 102823), (259, 82576), (296, 72254), (364, 58756), (397, 53872), (481, 44464), (518, 41288), (592, 36127), (728, 29378), (794, 26936), (962, 22232), (1036, 20644), (1456, 14689), (1588, 13468), (1924, 11116), (2072, 10322), (2779, 7696), (3176, 6734), (3367, 6352), (3848, 5558), (4144, 5161)]