221489420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{357241}}^1$

素因数の和:357281

約数の個数: 24

約数和(自身を含む): 480133248

約数和(自身を除く): 258643828

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 357241, 714482, 1428964, 1786205, 3572410, 7144820, 11074471, 22148942, 44297884, 55372355, 110744710, 221489420]

約数ペア:

[(1, 221489420), (2, 110744710), (4, 55372355), (5, 44297884), (10, 22148942), (20, 11074471), (31, 7144820), (62, 3572410), (124, 1786205), (155, 1428964), (310, 714482), (620, 357241)]