21177790

素因数分解:

$2^1\times 5^1\times {\mathrm{239}}^1\times {\mathrm{8861}}^1$

素因数の和:9107

約数の個数: 16

約数和(自身を含む): 38283840

約数和(自身を除く): 17106050

約数列:

[1, 2, 5, 10, 239, 478, 1195, 2390, 8861, 17722, 44305, 88610, 2117779, 4235558, 10588895, 21177790]

約数ペア:

[(1, 21177790), (2, 10588895), (5, 4235558), (10, 2117779), (239, 88610), (478, 44305), (1195, 17722), (2390, 8861)]