21546920

素因数分解:

$2^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{1721}}^1$

素因数の和:2045

約数の個数: 32

約数和(自身を含む): 48663720

約数和(自身を除く): 27116800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 313, 626, 1252, 1565, 1721, 2504, 3130, 3442, 6260, 6884, 8605, 12520, 13768, 17210, 34420, 68840, 538673, 1077346, 2154692, 2693365, 4309384, 5386730, 10773460, 21546920]

約数ペア:

[(1, 21546920), (2, 10773460), (4, 5386730), (5, 4309384), (8, 2693365), (10, 2154692), (20, 1077346), (40, 538673), (313, 68840), (626, 34420), (1252, 17210), (1565, 13768), (1721, 12520), (2504, 8605), (3130, 6884), (3442, 6260)]