280015240

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{170741}}^1$

素因数の和:170793

約数の個数: 32

約数和(自身を含む): 645404760

約数和(自身を除く): 365389520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 170741, 341482, 682964, 853705, 1365928, 1707410, 3414820, 6829640, 7000381, 14000762, 28001524, 35001905, 56003048, 70003810, 140007620, 280015240]

約数ペア:

[(1, 280015240), (2, 140007620), (4, 70003810), (5, 56003048), (8, 35001905), (10, 28001524), (20, 14000762), (40, 7000381), (41, 6829640), (82, 3414820), (164, 1707410), (205, 1365928), (328, 853705), (410, 682964), (820, 341482), (1640, 170741)]