21420855

素因数分解:

$3^4\times 5^1\times {\mathrm{227}}^1\times {\mathrm{233}}^1$

素因数の和:477

約数の個数: 40

約数和(自身を含む): 38733552

約数和(自身を除く): 17312697

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 227, 233, 405, 681, 699, 1135, 1165, 2043, 2097, 3405, 3495, 6129, 6291, 10215, 10485, 18387, 18873, 30645, 31455, 52891, 91935, 94365, 158673, 264455, 476019, 793365, 1428057, 2380095, 4284171, 7140285, 21420855]

約数ペア:

[(1, 21420855), (3, 7140285), (5, 4284171), (9, 2380095), (15, 1428057), (27, 793365), (45, 476019), (81, 264455), (135, 158673), (227, 94365), (233, 91935), (405, 52891), (681, 31455), (699, 30645), (1135, 18873), (1165, 18387), (2043, 10485), (2097, 10215), (3405, 6291), (3495, 6129)]