251039490

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{643691}}^1$

素因数の和:643714

約数の個数: 32

約数和(自身を含む): 648841536

約数和(自身を除く): 397802046

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 643691, 1287382, 1931073, 3218455, 3862146, 6436910, 8367983, 9655365, 16735966, 19310730, 25103949, 41839915, 50207898, 83679830, 125519745, 251039490]

約数ペア:

[(1, 251039490), (2, 125519745), (3, 83679830), (5, 50207898), (6, 41839915), (10, 25103949), (13, 19310730), (15, 16735966), (26, 9655365), (30, 8367983), (39, 6436910), (65, 3862146), (78, 3218455), (130, 1931073), (195, 1287382), (390, 643691)]