20018745

素因数分解:

$3^4\times 5^1\times {\mathrm{49429}}^1$

素因数の和:49446

約数の個数: 20

約数和(自身を含む): 35886180

約数和(自身を除く): 15867435

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 49429, 148287, 247145, 444861, 741435, 1334583, 2224305, 4003749, 6672915, 20018745]

約数ペア:

[(1, 20018745), (3, 6672915), (5, 4003749), (9, 2224305), (15, 1334583), (27, 741435), (45, 444861), (81, 247145), (135, 148287), (405, 49429)]