81999740

素因数分解:

$2^2\times 5^1\times {\mathrm{313}}^1\times {\mathrm{13099}}^1$

素因数の和:13421

約数の個数: 24

約数和(自身を含む): 172762800

約数和(自身を除く): 90763060

約数列:

[1, 2, 4, 5, 10, 20, 313, 626, 1252, 1565, 3130, 6260, 13099, 26198, 52396, 65495, 130990, 261980, 4099987, 8199974, 16399948, 20499935, 40999870, 81999740]

約数ペア:

[(1, 81999740), (2, 40999870), (4, 20499935), (5, 16399948), (10, 8199974), (20, 4099987), (313, 261980), (626, 130990), (1252, 65495), (1565, 52396), (3130, 26198), (6260, 13099)]