19720420

素因数分解:

$2^2\times 5^1\times {\mathrm{821}}^1\times {\mathrm{1201}}^1$

素因数の和:2031

約数の個数: 24

約数和(自身を含む): 41497848

約数和(自身を除く): 21777428

約数列:

[1, 2, 4, 5, 10, 20, 821, 1201, 1642, 2402, 3284, 4105, 4804, 6005, 8210, 12010, 16420, 24020, 986021, 1972042, 3944084, 4930105, 9860210, 19720420]

約数ペア:

[(1, 19720420), (2, 9860210), (4, 4930105), (5, 3944084), (10, 1972042), (20, 986021), (821, 24020), (1201, 16420), (1642, 12010), (2402, 8210), (3284, 6005), (4105, 4804)]