19702820

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11069}}^1$

素因数の和:11167

約数の個数: 24

約数和(自身を含む): 41844600

約数和(自身を除く): 22141780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 11069, 22138, 44276, 55345, 110690, 221380, 985141, 1970282, 3940564, 4925705, 9851410, 19702820]

約数ペア:

[(1, 19702820), (2, 9851410), (4, 4925705), (5, 3940564), (10, 1970282), (20, 985141), (89, 221380), (178, 110690), (356, 55345), (445, 44276), (890, 22138), (1780, 11069)]