21127815

素因数分解:

$3^2\times 5^1\times {\mathrm{653}}^1\times {\mathrm{719}}^1$

素因数の和:1383

約数の個数: 24

約数和(自身を含む): 36728640

約数和(自身を除く): 15600825

約数列:

[1, 3, 5, 9, 15, 45, 653, 719, 1959, 2157, 3265, 3595, 5877, 6471, 9795, 10785, 29385, 32355, 469507, 1408521, 2347535, 4225563, 7042605, 21127815]

約数ペア:

[(1, 21127815), (3, 7042605), (5, 4225563), (9, 2347535), (15, 1408521), (45, 469507), (653, 32355), (719, 29385), (1959, 10785), (2157, 9795), (3265, 6471), (3595, 5877)]