20828710

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{1997}}^1$

素因数の和:2160

約数の個数: 32

約数和(自身を含む): 43156800

約数和(自身を除く): 22328090

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 149, 298, 745, 1043, 1490, 1997, 2086, 3994, 5215, 9985, 10430, 13979, 19970, 27958, 69895, 139790, 297553, 595106, 1487765, 2082871, 2975530, 4165742, 10414355, 20828710]

約数ペア:

[(1, 20828710), (2, 10414355), (5, 4165742), (7, 2975530), (10, 2082871), (14, 1487765), (35, 595106), (70, 297553), (149, 139790), (298, 69895), (745, 27958), (1043, 19970), (1490, 13979), (1997, 10430), (2086, 9985), (3994, 5215)]