21240820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{62473}}^1$

素因数の和:62499

約数の個数: 24

約数和(自身を含む): 47230344

約数和(自身を除く): 25989524

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 62473, 124946, 249892, 312365, 624730, 1062041, 1249460, 2124082, 4248164, 5310205, 10620410, 21240820]

約数ペア:

[(1, 21240820), (2, 10620410), (4, 5310205), (5, 4248164), (10, 2124082), (17, 1249460), (20, 1062041), (34, 624730), (68, 312365), (85, 249892), (170, 124946), (340, 62473)]