639716623

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{131}}^1\times {\mathrm{521}}^1$

素因数の和:775

約数の個数: 32

約数和(自身を含む): 802593792

約数和(自身を除く): 162877169

約数列:

[1, 7, 13, 91, 103, 131, 521, 721, 917, 1339, 1703, 3647, 6773, 9373, 11921, 13493, 47411, 53663, 68251, 94451, 175409, 375641, 477757, 697619, 887263, 1227863, 4883333, 6210841, 7029853, 49208971, 91388089, 639716623]

約数ペア:

[(1, 639716623), (7, 91388089), (13, 49208971), (91, 7029853), (103, 6210841), (131, 4883333), (521, 1227863), (721, 887263), (917, 697619), (1339, 477757), (1703, 375641), (3647, 175409), (6773, 94451), (9373, 68251), (11921, 53663), (13493, 47411)]