20782480

素因数分解:

$2^4\times 5^1\times {\mathrm{259781}}^1$

素因数の和:259794

約数の個数: 20

約数和(自身を含む): 48319452

約数和(自身を除く): 27536972

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 259781, 519562, 1039124, 1298905, 2078248, 2597810, 4156496, 5195620, 10391240, 20782480]

約数ペア:

[(1, 20782480), (2, 10391240), (4, 5195620), (5, 4156496), (8, 2597810), (10, 2078248), (16, 1298905), (20, 1039124), (40, 519562), (80, 259781)]