21029020

素因数分解:

$2^2\times 5^1\times {\mathrm{991}}^1\times {\mathrm{1061}}^1$

素因数の和:2061

約数の個数: 24

約数和(自身を含む): 44247168

約数和(自身を除く): 23218148

約数列:

[1, 2, 4, 5, 10, 20, 991, 1061, 1982, 2122, 3964, 4244, 4955, 5305, 9910, 10610, 19820, 21220, 1051451, 2102902, 4205804, 5257255, 10514510, 21029020]

約数ペア:

[(1, 21029020), (2, 10514510), (4, 5257255), (5, 4205804), (10, 2102902), (20, 1051451), (991, 21220), (1061, 19820), (1982, 10610), (2122, 9910), (3964, 5305), (4244, 4955)]