20400653

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{83}}^1$

素因数の和:213

約数の個数: 32

約数和(自身を含む): 26455296

約数和(自身を除く): 6054643

約数列:

[1, 7, 13, 37, 73, 83, 91, 259, 481, 511, 581, 949, 1079, 2701, 3071, 3367, 6059, 6643, 7553, 18907, 21497, 35113, 39923, 42413, 78767, 224183, 245791, 279461, 551369, 1569281, 2914379, 20400653]

約数ペア:

[(1, 20400653), (7, 2914379), (13, 1569281), (37, 551369), (73, 279461), (83, 245791), (91, 224183), (259, 78767), (481, 42413), (511, 39923), (581, 35113), (949, 21497), (1079, 18907), (2701, 7553), (3071, 6643), (3367, 6059)]