21486815

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{409}}^1$

素因数の和:519

約数の個数: 32

約数和(自身を含む): 31488000

約数和(自身を除く): 10001185

約数列:

[1, 5, 7, 19, 35, 79, 95, 133, 395, 409, 553, 665, 1501, 2045, 2765, 2863, 7505, 7771, 10507, 14315, 32311, 38855, 52535, 54397, 161555, 226177, 271985, 613909, 1130885, 3069545, 4297363, 21486815]

約数ペア:

[(1, 21486815), (5, 4297363), (7, 3069545), (19, 1130885), (35, 613909), (79, 271985), (95, 226177), (133, 161555), (395, 54397), (409, 52535), (553, 38855), (665, 32311), (1501, 14315), (2045, 10507), (2765, 7771), (2863, 7505)]