18780940

素因数分解:

$2^2\times 5^1\times {\mathrm{331}}^1\times {\mathrm{2837}}^1$

素因数の和:3177

約数の個数: 24

約数和(自身を含む): 39573072

約数和(自身を除く): 20792132

約数列:

[1, 2, 4, 5, 10, 20, 331, 662, 1324, 1655, 2837, 3310, 5674, 6620, 11348, 14185, 28370, 56740, 939047, 1878094, 3756188, 4695235, 9390470, 18780940]

約数ペア:

[(1, 18780940), (2, 9390470), (4, 4695235), (5, 3756188), (10, 1878094), (20, 939047), (331, 56740), (662, 28370), (1324, 14185), (1655, 11348), (2837, 6620), (3310, 5674)]