20909540

素因数分解:

$2^2\times 5^1\times {\mathrm{523}}^1\times {\mathrm{1999}}^1$

素因数の和:2531

約数の個数: 24

約数和(自身を含む): 44016000

約数和(自身を除く): 23106460

約数列:

[1, 2, 4, 5, 10, 20, 523, 1046, 1999, 2092, 2615, 3998, 5230, 7996, 9995, 10460, 19990, 39980, 1045477, 2090954, 4181908, 5227385, 10454770, 20909540]

約数ペア:

[(1, 20909540), (2, 10454770), (4, 5227385), (5, 4181908), (10, 2090954), (20, 1045477), (523, 39980), (1046, 19990), (1999, 10460), (2092, 9995), (2615, 7996), (3998, 5230)]