639990281

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{653}}^1\times {\mathrm{7369}}^1$

素因数の和:8048

約数の個数: 16

約数和(自身を含む): 771196800

約数和(自身を除く): 131206519

約数列:

[1, 7, 19, 133, 653, 4571, 7369, 12407, 51583, 86849, 140011, 980077, 4811957, 33683699, 91427183, 639990281]

約数ペア:

[(1, 639990281), (7, 91427183), (19, 33683699), (133, 4811957), (653, 980077), (4571, 140011), (7369, 86849), (12407, 51583)]