20210860

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{331}}^1$

素因数の和:454

約数の個数: 48

約数和(自身を含む): 44174592

約数和(自身を除く): 23963732

約数列:

[1, 2, 4, 5, 10, 20, 43, 71, 86, 142, 172, 215, 284, 331, 355, 430, 662, 710, 860, 1324, 1420, 1655, 3053, 3310, 6106, 6620, 12212, 14233, 15265, 23501, 28466, 30530, 47002, 56932, 61060, 71165, 94004, 117505, 142330, 235010, 284660, 470020, 1010543, 2021086, 4042172, 5052715, 10105430, 20210860]

約数ペア:

[(1, 20210860), (2, 10105430), (4, 5052715), (5, 4042172), (10, 2021086), (20, 1010543), (43, 470020), (71, 284660), (86, 235010), (142, 142330), (172, 117505), (215, 94004), (284, 71165), (331, 61060), (355, 56932), (430, 47002), (662, 30530), (710, 28466), (860, 23501), (1324, 15265), (1420, 14233), (1655, 12212), (3053, 6620), (3310, 6106)]