199499975

素因数分解:

$5^2\times {\mathrm{109}}^1\times {\mathrm{179}}^1\times {\mathrm{409}}^1$

素因数の和:707

約数の個数: 24

約数和(自身を含む): 251658000

約数和(自身を除く): 52158025

約数列:

[1, 5, 25, 109, 179, 409, 545, 895, 2045, 2725, 4475, 10225, 19511, 44581, 73211, 97555, 222905, 366055, 487775, 1114525, 1830275, 7979999, 39899995, 199499975]

約数ペア:

[(1, 199499975), (5, 39899995), (25, 7979999), (109, 1830275), (179, 1114525), (409, 487775), (545, 366055), (895, 222905), (2045, 97555), (2725, 73211), (4475, 44581), (10225, 19511)]