21853780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{84053}}^1$

素因数の和:84075

約数の個数: 24

約数和(自身を含む): 49423752

約数和(自身を除く): 27569972

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 84053, 168106, 336212, 420265, 840530, 1092689, 1681060, 2185378, 4370756, 5463445, 10926890, 21853780]

約数ペア:

[(1, 21853780), (2, 10926890), (4, 5463445), (5, 4370756), (10, 2185378), (13, 1681060), (20, 1092689), (26, 840530), (52, 420265), (65, 336212), (130, 168106), (260, 84053)]