21095750

素因数分解:

$2^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{6491}}^1$

素因数の和:6521

約数の個数: 32

約数和(自身を含む): 42535584

約数和(自身を除く): 21439834

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 250, 325, 650, 1625, 3250, 6491, 12982, 32455, 64910, 84383, 162275, 168766, 324550, 421915, 811375, 843830, 1622750, 2109575, 4219150, 10547875, 21095750]

約数ペア:

[(1, 21095750), (2, 10547875), (5, 4219150), (10, 2109575), (13, 1622750), (25, 843830), (26, 811375), (50, 421915), (65, 324550), (125, 168766), (130, 162275), (250, 84383), (325, 64910), (650, 32455), (1625, 12982), (3250, 6491)]