81081620

素因数分解:

$2^2\times 5^1\times {\mathrm{1061}}^1\times {\mathrm{3821}}^1$

素因数の和:4891

約数の個数: 24

約数和(自身を含む): 170476488

約数和(自身を除く): 89394868

約数列:

[1, 2, 4, 5, 10, 20, 1061, 2122, 3821, 4244, 5305, 7642, 10610, 15284, 19105, 21220, 38210, 76420, 4054081, 8108162, 16216324, 20270405, 40540810, 81081620]

約数ペア:

[(1, 81081620), (2, 40540810), (4, 20270405), (5, 16216324), (10, 8108162), (20, 4054081), (1061, 76420), (2122, 38210), (3821, 21220), (4244, 19105), (5305, 15284), (7642, 10610)]