20557220

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11549}}^1$

素因数の和:11647

約数の個数: 24

約数和(自身を含む): 43659000

約数和(自身を除く): 23101780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 11549, 23098, 46196, 57745, 115490, 230980, 1027861, 2055722, 4111444, 5139305, 10278610, 20557220]

約数ペア:

[(1, 20557220), (2, 10278610), (4, 5139305), (5, 4111444), (10, 2055722), (20, 1027861), (89, 230980), (178, 115490), (356, 57745), (445, 46196), (890, 23098), (1780, 11549)]