20017515

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{311}}^1\times {\mathrm{613}}^1$

素因数の和:939

約数の個数: 32

約数和(自身を含む): 36781056

約数和(自身を除く): 16763541

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 311, 613, 933, 1555, 1839, 2177, 3065, 4291, 4665, 6531, 9195, 10885, 12873, 21455, 32655, 64365, 190643, 571929, 953215, 1334501, 2859645, 4003503, 6672505, 20017515]

約数ペア:

[(1, 20017515), (3, 6672505), (5, 4003503), (7, 2859645), (15, 1334501), (21, 953215), (35, 571929), (105, 190643), (311, 64365), (613, 32655), (933, 21455), (1555, 12873), (1839, 10885), (2177, 9195), (3065, 6531), (4291, 4665)]