639855561

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{138407}}^1$

素因数の和:138500

約数の個数: 16

約数和(自身を含む): 903527424

約数和(自身を除く): 263671863

約数列:

[1, 3, 23, 67, 69, 201, 1541, 4623, 138407, 415221, 3183361, 9273269, 9550083, 27819807, 213285187, 639855561]

約数ペア:

[(1, 639855561), (3, 213285187), (23, 27819807), (67, 9550083), (69, 9273269), (201, 3183361), (1541, 415221), (4623, 138407)]