640188969

素因数分解:

$3^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{189349}}^1$

素因数の和:189389

約数の個数: 24

約数和(自身を含む): 1036123200

約数和(自身を除く): 395934231

約数列:

[1, 3, 7, 21, 23, 49, 69, 147, 161, 483, 1127, 3381, 189349, 568047, 1325443, 3976329, 4355027, 9278101, 13065081, 27834303, 30485189, 91455567, 213396323, 640188969]

約数ペア:

[(1, 640188969), (3, 213396323), (7, 91455567), (21, 30485189), (23, 27834303), (49, 13065081), (69, 9278101), (147, 4355027), (161, 3976329), (483, 1325443), (1127, 568047), (3381, 189349)]