21987760

素因数分解:

$2^4\times 5^1\times {\mathrm{274847}}^1$

素因数の和:274860

約数の個数: 20

約数和(自身を含む): 51121728

約数和(自身を除く): 29133968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 274847, 549694, 1099388, 1374235, 2198776, 2748470, 4397552, 5496940, 10993880, 21987760]

約数ペア:

[(1, 21987760), (2, 10993880), (4, 5496940), (5, 4397552), (8, 2748470), (10, 2198776), (16, 1374235), (20, 1099388), (40, 549694), (80, 274847)]