21652820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{733}}^1$

素因数の和:960

約数の個数: 48

約数和(自身を含む): 52284288

約数和(自身を除く): 30631468

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 211, 422, 733, 844, 1055, 1466, 1477, 2110, 2932, 2954, 3665, 4220, 5131, 5908, 7330, 7385, 10262, 14660, 14770, 20524, 25655, 29540, 51310, 102620, 154663, 309326, 618652, 773315, 1082641, 1546630, 2165282, 3093260, 4330564, 5413205, 10826410, 21652820]

約数ペア:

[(1, 21652820), (2, 10826410), (4, 5413205), (5, 4330564), (7, 3093260), (10, 2165282), (14, 1546630), (20, 1082641), (28, 773315), (35, 618652), (70, 309326), (140, 154663), (211, 102620), (422, 51310), (733, 29540), (844, 25655), (1055, 20524), (1466, 14770), (1477, 14660), (2110, 10262), (2932, 7385), (2954, 7330), (3665, 5908), (4220, 5131)]