21422680

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{3853}}^1$

素因数の和:4003

約数の個数: 32

約数和(自身を含む): 48560400

約数和(自身を除く): 27137720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 3853, 5560, 7706, 15412, 19265, 30824, 38530, 77060, 154120, 535567, 1071134, 2142268, 2677835, 4284536, 5355670, 10711340, 21422680]

約数ペア:

[(1, 21422680), (2, 10711340), (4, 5355670), (5, 4284536), (8, 2677835), (10, 2142268), (20, 1071134), (40, 535567), (139, 154120), (278, 77060), (556, 38530), (695, 30824), (1112, 19265), (1390, 15412), (2780, 7706), (3853, 5560)]