21017720

素因数分解:

$2^3\times 5^1\times {\mathrm{181}}^1\times {\mathrm{2903}}^1$

素因数の和:3095

約数の個数: 32

約数和(自身を含む): 47567520

約数和(自身を除く): 26549800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 181, 362, 724, 905, 1448, 1810, 2903, 3620, 5806, 7240, 11612, 14515, 23224, 29030, 58060, 116120, 525443, 1050886, 2101772, 2627215, 4203544, 5254430, 10508860, 21017720]

約数ペア:

[(1, 21017720), (2, 10508860), (4, 5254430), (5, 4203544), (8, 2627215), (10, 2101772), (20, 1050886), (40, 525443), (181, 116120), (362, 58060), (724, 29030), (905, 23224), (1448, 14515), (1810, 11612), (2903, 7240), (3620, 5806)]