20808893

素因数分解:

$7^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1\times {\mathrm{281}}^1$

素因数の和:508

約数の個数: 16

約数和(自身を含む): 24364800

約数和(自身を除く): 3555907

約数列:

[1, 7, 71, 149, 281, 497, 1043, 1967, 10579, 19951, 41869, 74053, 139657, 293083, 2972699, 20808893]

約数ペア:

[(1, 20808893), (7, 2972699), (71, 293083), (149, 139657), (281, 74053), (497, 41869), (1043, 19951), (1967, 10579)]