20669360

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2903}}^1$

素因数の和:3005

約数の個数: 40

約数和(自身を含む): 48612960

約数和(自身を除く): 27943600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2903, 3560, 5806, 7120, 11612, 14515, 23224, 29030, 46448, 58060, 116120, 232240, 258367, 516734, 1033468, 1291835, 2066936, 2583670, 4133872, 5167340, 10334680, 20669360]

約数ペア:

[(1, 20669360), (2, 10334680), (4, 5167340), (5, 4133872), (8, 2583670), (10, 2066936), (16, 1291835), (20, 1033468), (40, 516734), (80, 258367), (89, 232240), (178, 116120), (356, 58060), (445, 46448), (712, 29030), (890, 23224), (1424, 14515), (1780, 11612), (2903, 7120), (3560, 5806)]