20257360

素因数分解:

$2^4\times 5^1\times {\mathrm{313}}^1\times {\mathrm{809}}^1$

素因数の和:1135

約数の個数: 40

約数和(自身を含む): 47307240

約数和(自身を除く): 27049880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 313, 626, 809, 1252, 1565, 1618, 2504, 3130, 3236, 4045, 5008, 6260, 6472, 8090, 12520, 12944, 16180, 25040, 32360, 64720, 253217, 506434, 1012868, 1266085, 2025736, 2532170, 4051472, 5064340, 10128680, 20257360]

約数ペア:

[(1, 20257360), (2, 10128680), (4, 5064340), (5, 4051472), (8, 2532170), (10, 2025736), (16, 1266085), (20, 1012868), (40, 506434), (80, 253217), (313, 64720), (626, 32360), (809, 25040), (1252, 16180), (1565, 12944), (1618, 12520), (2504, 8090), (3130, 6472), (3236, 6260), (4045, 5008)]