19916225

素因数分解:

$5^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{1559}}^1$

素因数の和:1649

約数の個数: 24

約数和(自身を含む): 28629120

約数和(自身を除く): 8712895

約数列:

[1, 5, 7, 25, 35, 73, 175, 365, 511, 1559, 1825, 2555, 7795, 10913, 12775, 38975, 54565, 113807, 272825, 569035, 796649, 2845175, 3983245, 19916225]

約数ペア:

[(1, 19916225), (5, 3983245), (7, 2845175), (25, 796649), (35, 569035), (73, 272825), (175, 113807), (365, 54565), (511, 38975), (1559, 12775), (1825, 10913), (2555, 7795)]