21116960

素因数分解:

$2^5\times 5^1\times {\mathrm{191}}^1\times {\mathrm{691}}^1$

素因数の和:897

約数の個数: 48

約数和(自身を含む): 50222592

約数和(自身を除く): 29105632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 191, 382, 691, 764, 955, 1382, 1528, 1910, 2764, 3056, 3455, 3820, 5528, 6112, 6910, 7640, 11056, 13820, 15280, 22112, 27640, 30560, 55280, 110560, 131981, 263962, 527924, 659905, 1055848, 1319810, 2111696, 2639620, 4223392, 5279240, 10558480, 21116960]

約数ペア:

[(1, 21116960), (2, 10558480), (4, 5279240), (5, 4223392), (8, 2639620), (10, 2111696), (16, 1319810), (20, 1055848), (32, 659905), (40, 527924), (80, 263962), (160, 131981), (191, 110560), (382, 55280), (691, 30560), (764, 27640), (955, 22112), (1382, 15280), (1528, 13820), (1910, 11056), (2764, 7640), (3056, 6910), (3455, 6112), (3820, 5528)]