644896609

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{67891}}^1$

素因数の和:67980

約数の個数: 16

約数和(自身を含む): 782115840

約数和(自身を除く): 137219231

約数列:

[1, 7, 23, 59, 161, 413, 1357, 9499, 67891, 475237, 1561493, 4005569, 10930451, 28038983, 92128087, 644896609]

約数ペア:

[(1, 644896609), (7, 92128087), (23, 28038983), (59, 10930451), (161, 4005569), (413, 1561493), (1357, 475237), (9499, 67891)]