20409560

素因数分解:

$2^3\times 5^1\times {\mathrm{181}}^1\times {\mathrm{2819}}^1$

素因数の和:3011

約数の個数: 32

約数和(自身を含む): 46191600

約数和(自身を除く): 25782040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 181, 362, 724, 905, 1448, 1810, 2819, 3620, 5638, 7240, 11276, 14095, 22552, 28190, 56380, 112760, 510239, 1020478, 2040956, 2551195, 4081912, 5102390, 10204780, 20409560]

約数ペア:

[(1, 20409560), (2, 10204780), (4, 5102390), (5, 4081912), (8, 2551195), (10, 2040956), (20, 1020478), (40, 510239), (181, 112760), (362, 56380), (724, 28190), (905, 22552), (1448, 14095), (1810, 11276), (2819, 7240), (3620, 5638)]