31318120

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{3511}}^1$

素因数の和:3745

約数の個数: 32

約数和(自身を含む): 70801920

約数和(自身を除く): 39483800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2230, 3511, 4460, 7022, 8920, 14044, 17555, 28088, 35110, 70220, 140440, 782953, 1565906, 3131812, 3914765, 6263624, 7829530, 15659060, 31318120]

約数ペア:

[(1, 31318120), (2, 15659060), (4, 7829530), (5, 6263624), (8, 3914765), (10, 3131812), (20, 1565906), (40, 782953), (223, 140440), (446, 70220), (892, 35110), (1115, 28088), (1784, 17555), (2230, 14044), (3511, 8920), (4460, 7022)]