19954040

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{2237}}^1$

素因数の和:2471

約数の個数: 32

約数和(自身を含む): 45118080

約数和(自身を除く): 25164040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2230, 2237, 4460, 4474, 8920, 8948, 11185, 17896, 22370, 44740, 89480, 498851, 997702, 1995404, 2494255, 3990808, 4988510, 9977020, 19954040]

約数ペア:

[(1, 19954040), (2, 9977020), (4, 4988510), (5, 3990808), (8, 2494255), (10, 1995404), (20, 997702), (40, 498851), (223, 89480), (446, 44740), (892, 22370), (1115, 17896), (1784, 11185), (2230, 8948), (2237, 8920), (4460, 4474)]