21821620

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{5171}}^1$

素因数の和:5391

約数の個数: 24

約数和(自身を含む): 46051488

約数和(自身を除く): 24229868

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1055, 2110, 4220, 5171, 10342, 20684, 25855, 51710, 103420, 1091081, 2182162, 4364324, 5455405, 10910810, 21821620]

約数ペア:

[(1, 21821620), (2, 10910810), (4, 5455405), (5, 4364324), (10, 2182162), (20, 1091081), (211, 103420), (422, 51710), (844, 25855), (1055, 20684), (2110, 10342), (4220, 5171)]