21311960

素因数分解:

$2^3\times 5^1\times {\mathrm{677}}^1\times {\mathrm{787}}^1$

素因数の和:1475

約数の個数: 32

約数和(自身を含む): 48083760

約数和(自身を除く): 26771800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 677, 787, 1354, 1574, 2708, 3148, 3385, 3935, 5416, 6296, 6770, 7870, 13540, 15740, 27080, 31480, 532799, 1065598, 2131196, 2663995, 4262392, 5327990, 10655980, 21311960]

約数ペア:

[(1, 21311960), (2, 10655980), (4, 5327990), (5, 4262392), (8, 2663995), (10, 2131196), (20, 1065598), (40, 532799), (677, 31480), (787, 27080), (1354, 15740), (1574, 13540), (2708, 7870), (3148, 6770), (3385, 6296), (3935, 5416)]