21122220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{50291}}^1$

素因数の和:50310

約数の個数: 48

約数和(自身を含む): 67592448

約数和(自身を除く): 46470228

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 50291, 100582, 150873, 201164, 251455, 301746, 352037, 502910, 603492, 704074, 754365, 1005820, 1056111, 1408148, 1508730, 1760185, 2112222, 3017460, 3520370, 4224444, 5280555, 7040740, 10561110, 21122220]

約数ペア:

[(1, 21122220), (2, 10561110), (3, 7040740), (4, 5280555), (5, 4224444), (6, 3520370), (7, 3017460), (10, 2112222), (12, 1760185), (14, 1508730), (15, 1408148), (20, 1056111), (21, 1005820), (28, 754365), (30, 704074), (35, 603492), (42, 502910), (60, 352037), (70, 301746), (84, 251455), (105, 201164), (140, 150873), (210, 100582), (420, 50291)]