21991520

素因数分解:

$2^5\times 5^1\times {\mathrm{137447}}^1$

素因数の和:137462

約数の個数: 24

約数和(自身を含む): 51955344

約数和(自身を除く): 29963824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 137447, 274894, 549788, 687235, 1099576, 1374470, 2199152, 2748940, 4398304, 5497880, 10995760, 21991520]

約数ペア:

[(1, 21991520), (2, 10995760), (4, 5497880), (5, 4398304), (8, 2748940), (10, 2199152), (16, 1374470), (20, 1099576), (32, 687235), (40, 549788), (80, 274894), (160, 137447)]