640041655

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{375391}}^1$

素因数の和:375438

約数の個数: 16

約数和(自身を含む): 864903168

約数和(自身を除く): 224861513

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 375391, 1876955, 4129301, 11637121, 20646505, 58185605, 128008331, 640041655]

約数ペア:

[(1, 640041655), (5, 128008331), (11, 58185605), (31, 20646505), (55, 11637121), (155, 4129301), (341, 1876955), (1705, 375391)]