31027940

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1\times {\mathrm{331}}^1$

素因数の和:492

約数の個数: 48

約数和(自身を含む): 67488960

約数和(自身を除く): 36461020

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 109, 172, 215, 218, 331, 430, 436, 545, 662, 860, 1090, 1324, 1655, 2180, 3310, 4687, 6620, 9374, 14233, 18748, 23435, 28466, 36079, 46870, 56932, 71165, 72158, 93740, 142330, 144316, 180395, 284660, 360790, 721580, 1551397, 3102794, 6205588, 7756985, 15513970, 31027940]

約数ペア:

[(1, 31027940), (2, 15513970), (4, 7756985), (5, 6205588), (10, 3102794), (20, 1551397), (43, 721580), (86, 360790), (109, 284660), (172, 180395), (215, 144316), (218, 142330), (331, 93740), (430, 72158), (436, 71165), (545, 56932), (662, 46870), (860, 36079), (1090, 28466), (1324, 23435), (1655, 18748), (2180, 14233), (3310, 9374), (4687, 6620)]