21031940

素因数分解:

$2^2\times 5^1\times {\mathrm{739}}^1\times {\mathrm{1423}}^1$

素因数の和:2171

約数の個数: 24

約数和(自身を含む): 44257920

約数和(自身を除く): 23225980

約数列:

[1, 2, 4, 5, 10, 20, 739, 1423, 1478, 2846, 2956, 3695, 5692, 7115, 7390, 14230, 14780, 28460, 1051597, 2103194, 4206388, 5257985, 10515970, 21031940]

約数ペア:

[(1, 21031940), (2, 10515970), (4, 5257985), (5, 4206388), (10, 2103194), (20, 1051597), (739, 28460), (1423, 14780), (1478, 14230), (2846, 7390), (2956, 7115), (3695, 5692)]