28198820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{108457}}^1$

素因数の和:108479

約数の個数: 24

約数和(自身を含む): 63773304

約数和(自身を除く): 35574484

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 108457, 216914, 433828, 542285, 1084570, 1409941, 2169140, 2819882, 5639764, 7049705, 14099410, 28198820]

約数ペア:

[(1, 28198820), (2, 14099410), (4, 7049705), (5, 5639764), (10, 2819882), (13, 2169140), (20, 1409941), (26, 1084570), (52, 542285), (65, 433828), (130, 216914), (260, 108457)]