21270805

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{1259}}^1$

素因数の和:1404

約数の個数: 16

約数和(自身を含む): 26611200

約数和(自身を除く): 5340395

約数列:

[1, 5, 31, 109, 155, 545, 1259, 3379, 6295, 16895, 39029, 137231, 195145, 686155, 4254161, 21270805]

約数ペア:

[(1, 21270805), (5, 4254161), (31, 686155), (109, 195145), (155, 137231), (545, 39029), (1259, 16895), (3379, 6295)]