21709360

素因数分解:

$2^4\times 5^1\times {\mathrm{271367}}^1$

素因数の和:271380

約数の個数: 20

約数和(自身を含む): 50474448

約数和(自身を除く): 28765088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271367, 542734, 1085468, 1356835, 2170936, 2713670, 4341872, 5427340, 10854680, 21709360]

約数ペア:

[(1, 21709360), (2, 10854680), (4, 5427340), (5, 4341872), (8, 2713670), (10, 2170936), (16, 1356835), (20, 1085468), (40, 542734), (80, 271367)]