20712500

素因数分解:

$2^2\times 5^5\times {\mathrm{1657}}^1$

素因数の和:1686

約数の個数: 36

約数和(自身を含む): 45333036

約数和(自身を除く): 24620536

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 625, 1250, 1657, 2500, 3125, 3314, 6250, 6628, 8285, 12500, 16570, 33140, 41425, 82850, 165700, 207125, 414250, 828500, 1035625, 2071250, 4142500, 5178125, 10356250, 20712500]

約数ペア:

[(1, 20712500), (2, 10356250), (4, 5178125), (5, 4142500), (10, 2071250), (20, 1035625), (25, 828500), (50, 414250), (100, 207125), (125, 165700), (250, 82850), (500, 41425), (625, 33140), (1250, 16570), (1657, 12500), (2500, 8285), (3125, 6628), (3314, 6250)]