21820880

素因数分解:

$2^4\times 5^1\times {\mathrm{272761}}^1$

素因数の和:272774

約数の個数: 20

約数和(自身を含む): 50733732

約数和(自身を除く): 28912852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272761, 545522, 1091044, 1363805, 2182088, 2727610, 4364176, 5455220, 10910440, 21820880]

約数ペア:

[(1, 21820880), (2, 10910440), (4, 5455220), (5, 4364176), (8, 2727610), (10, 2182088), (16, 1363805), (20, 1091044), (40, 545522), (80, 272761)]