21814040

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7681}}^1$

素因数の和:7763

約数の個数: 32

約数和(自身を含む): 49779360

約数和(自身を除く): 27965320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7681, 15362, 30724, 38405, 61448, 76810, 153620, 307240, 545351, 1090702, 2181404, 2726755, 4362808, 5453510, 10907020, 21814040]

約数ペア:

[(1, 21814040), (2, 10907020), (4, 5453510), (5, 4362808), (8, 2726755), (10, 2181404), (20, 1090702), (40, 545351), (71, 307240), (142, 153620), (284, 76810), (355, 61448), (568, 38405), (710, 30724), (1420, 15362), (2840, 7681)]