20457985

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{1483}}^1$

素因数の和:1608

約数の個数: 16

約数和(自身を含む): 25643520

約数和(自身を除く): 5185535

約数列:

[1, 5, 31, 89, 155, 445, 1483, 2759, 7415, 13795, 45973, 131987, 229865, 659935, 4091597, 20457985]

約数ペア:

[(1, 20457985), (5, 4091597), (31, 659935), (89, 229865), (155, 131987), (445, 45973), (1483, 13795), (2759, 7415)]