661021775

素因数分解:

$5^2\times {\mathrm{991}}^1\times {\mathrm{26681}}^1$

素因数の和:27682

約数の個数: 12

約数和(自身を含む): 820524864

約数和(自身を除く): 159503089

約数列:

[1, 5, 25, 991, 4955, 24775, 26681, 133405, 667025, 26440871, 132204355, 661021775]

約数ペア:

[(1, 661021775), (5, 132204355), (25, 26440871), (991, 667025), (4955, 133405), (24775, 26681)]