640969225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{313}}^1\times {\mathrm{6301}}^1$

素因数の和:6637

約数の個数: 24

約数和(自身を含む): 858811352

約数和(自身を除く): 217842127

約数列:

[1, 5, 13, 25, 65, 313, 325, 1565, 4069, 6301, 7825, 20345, 31505, 81913, 101725, 157525, 409565, 1972213, 2047825, 9861065, 25638769, 49305325, 128193845, 640969225]

約数ペア:

[(1, 640969225), (5, 128193845), (13, 49305325), (25, 25638769), (65, 9861065), (313, 2047825), (325, 1972213), (1565, 409565), (4069, 157525), (6301, 101725), (7825, 81913), (20345, 31505)]