20121020

素因数分解:

$2^2\times 5^1\times {\mathrm{521}}^1\times {\mathrm{1931}}^1$

素因数の和:2461

約数の個数: 24

約数和(自身を含む): 42357168

約数和(自身を除く): 22236148

約数列:

[1, 2, 4, 5, 10, 20, 521, 1042, 1931, 2084, 2605, 3862, 5210, 7724, 9655, 10420, 19310, 38620, 1006051, 2012102, 4024204, 5030255, 10060510, 20121020]

約数ペア:

[(1, 20121020), (2, 10060510), (4, 5030255), (5, 4024204), (10, 2012102), (20, 1006051), (521, 38620), (1042, 19310), (1931, 10420), (2084, 9655), (2605, 7724), (3862, 5210)]