900020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{4091}}^1$

素因数の和:4111

約数の個数: 24

約数和(自身を含む): 2062368

約数和(自身を除く): 1162348

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 4091, 8182, 16364, 20455, 40910, 45001, 81820, 90002, 180004, 225005, 450010, 900020]

約数ペア:

[(1, 900020), (2, 450010), (4, 225005), (5, 180004), (10, 90002), (11, 81820), (20, 45001), (22, 40910), (44, 20455), (55, 16364), (110, 8182), (220, 4091)]