21384560

素因数分解:

$2^4\times 5^1\times {\mathrm{267307}}^1$

素因数の和:267320

約数の個数: 20

約数和(自身を含む): 49719288

約数和(自身を除く): 28334728

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267307, 534614, 1069228, 1336535, 2138456, 2673070, 4276912, 5346140, 10692280, 21384560]

約数ペア:

[(1, 21384560), (2, 10692280), (4, 5346140), (5, 4276912), (8, 2673070), (10, 2138456), (16, 1336535), (20, 1069228), (40, 534614), (80, 267307)]