21529475

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{991}}^1$

素因数の和:1091

約数の個数: 24

約数和(自身を含む): 29521920

約数和(自身を除く): 7992445

約数列:

[1, 5, 11, 25, 55, 79, 275, 395, 869, 991, 1975, 4345, 4955, 10901, 21725, 24775, 54505, 78289, 272525, 391445, 861179, 1957225, 4305895, 21529475]

約数ペア:

[(1, 21529475), (5, 4305895), (11, 1957225), (25, 861179), (55, 391445), (79, 272525), (275, 78289), (395, 54505), (869, 24775), (991, 21725), (1975, 10901), (4345, 4955)]