20808880

素因数分解:

$2^4\times 5^1\times {\mathrm{260111}}^1$

素因数の和:260124

約数の個数: 20

約数和(自身を含む): 48380832

約数和(自身を除く): 27571952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 260111, 520222, 1040444, 1300555, 2080888, 2601110, 4161776, 5202220, 10404440, 20808880]

約数ペア:

[(1, 20808880), (2, 10404440), (4, 5202220), (5, 4161776), (8, 2601110), (10, 2080888), (16, 1300555), (20, 1040444), (40, 520222), (80, 260111)]