21047135

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{151}}^1\times {\mathrm{457}}^1$

素因数の和:674

約数の個数: 16

約数和(自身を含む): 25897152

約数和(自身を除く): 4850017

約数列:

[1, 5, 61, 151, 305, 457, 755, 2285, 9211, 27877, 46055, 69007, 139385, 345035, 4209427, 21047135]

約数ペア:

[(1, 21047135), (5, 4209427), (61, 345035), (151, 139385), (305, 69007), (457, 46055), (755, 27877), (2285, 9211)]