21388990

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{43651}}^1$

素因数の和:43672

約数の個数: 24

約数和(自身を含む): 44786952

約数和(自身を除く): 23397962

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490, 43651, 87302, 218255, 305557, 436510, 611114, 1527785, 2138899, 3055570, 4277798, 10694495, 21388990]

約数ペア:

[(1, 21388990), (2, 10694495), (5, 4277798), (7, 3055570), (10, 2138899), (14, 1527785), (35, 611114), (49, 436510), (70, 305557), (98, 218255), (245, 87302), (490, 43651)]