681036255

素因数分解:

$3^4\times 5^1\times {\mathrm{1681571}}^1$

素因数の和:1681588

約数の個数: 20

約数和(自身を含む): 1220821272

約数和(自身を除く): 539785017

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 1681571, 5044713, 8407855, 15134139, 25223565, 45402417, 75670695, 136207251, 227012085, 681036255]

約数ペア:

[(1, 681036255), (3, 227012085), (5, 136207251), (9, 75670695), (15, 45402417), (27, 25223565), (45, 15134139), (81, 8407855), (135, 5044713), (405, 1681571)]