21163020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{521}}^1\times {\mathrm{677}}^1$

素因数の和:1210

約数の個数: 48

約数和(自身を含む): 59457888

約数和(自身を除く): 38294868

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 521, 677, 1042, 1354, 1563, 2031, 2084, 2605, 2708, 3126, 3385, 4062, 5210, 6252, 6770, 7815, 8124, 10155, 10420, 13540, 15630, 20310, 31260, 40620, 352717, 705434, 1058151, 1410868, 1763585, 2116302, 3527170, 4232604, 5290755, 7054340, 10581510, 21163020]

約数ペア:

[(1, 21163020), (2, 10581510), (3, 7054340), (4, 5290755), (5, 4232604), (6, 3527170), (10, 2116302), (12, 1763585), (15, 1410868), (20, 1058151), (30, 705434), (60, 352717), (521, 40620), (677, 31260), (1042, 20310), (1354, 15630), (1563, 13540), (2031, 10420), (2084, 10155), (2605, 8124), (2708, 7815), (3126, 6770), (3385, 6252), (4062, 5210)]