644180

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1039}}^1$

素因数の和:1079

約数の個数: 24

約数和(自身を含む): 1397760

約数和(自身を除く): 753580

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 1039, 2078, 4156, 5195, 10390, 20780, 32209, 64418, 128836, 161045, 322090, 644180]

約数ペア:

[(1, 644180), (2, 322090), (4, 161045), (5, 128836), (10, 64418), (20, 32209), (31, 20780), (62, 10390), (124, 5195), (155, 4156), (310, 2078), (620, 1039)]