21335648

素因数分解:

$2^5\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{277}}^1$

素因数の和:399

約数の個数: 48

約数和(自身を含む): 44135280

約数和(自身を除く): 22799632

約数列:

[1, 2, 4, 8, 16, 29, 32, 58, 83, 116, 166, 232, 277, 332, 464, 554, 664, 928, 1108, 1328, 2216, 2407, 2656, 4432, 4814, 8033, 8864, 9628, 16066, 19256, 22991, 32132, 38512, 45982, 64264, 77024, 91964, 128528, 183928, 257056, 367856, 666739, 735712, 1333478, 2666956, 5333912, 10667824, 21335648]

約数ペア:

[(1, 21335648), (2, 10667824), (4, 5333912), (8, 2666956), (16, 1333478), (29, 735712), (32, 666739), (58, 367856), (83, 257056), (116, 183928), (166, 128528), (232, 91964), (277, 77024), (332, 64264), (464, 45982), (554, 38512), (664, 32132), (928, 22991), (1108, 19256), (1328, 16066), (2216, 9628), (2407, 8864), (2656, 8033), (4432, 4814)]