21121208

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{155303}}^1$

素因数の和:155326

約数の個数: 16

約数和(自身を含む): 41932080

約数和(自身を除く): 20810872

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 155303, 310606, 621212, 1242424, 2640151, 5280302, 10560604, 21121208]

約数ペア:

[(1, 21121208), (2, 10560604), (4, 5280302), (8, 2640151), (17, 1242424), (34, 621212), (68, 310606), (136, 155303)]