18804920

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{1873}}^1$

素因数の和:2135

約数の個数: 32

約数和(自身を含む): 42502320

約数和(自身を除く): 23697400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 1873, 2008, 2510, 3746, 5020, 7492, 9365, 10040, 14984, 18730, 37460, 74920, 470123, 940246, 1880492, 2350615, 3760984, 4701230, 9402460, 18804920]

約数ペア:

[(1, 18804920), (2, 9402460), (4, 4701230), (5, 3760984), (8, 2350615), (10, 1880492), (20, 940246), (40, 470123), (251, 74920), (502, 37460), (1004, 18730), (1255, 14984), (1873, 10040), (2008, 9365), (2510, 7492), (3746, 5020)]