21172820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{62273}}^1$

素因数の和:62299

約数の個数: 24

約数和(自身を含む): 47079144

約数和(自身を除く): 25906324

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 62273, 124546, 249092, 311365, 622730, 1058641, 1245460, 2117282, 4234564, 5293205, 10586410, 21172820]

約数ペア:

[(1, 21172820), (2, 10586410), (4, 5293205), (5, 4234564), (10, 2117282), (17, 1245460), (20, 1058641), (34, 622730), (68, 311365), (85, 249092), (170, 124546), (340, 62273)]