20808820

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{4931}}^1$

素因数の和:5151

約数の個数: 24

約数和(自身を含む): 43914528

約数和(自身を除く): 23105708

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1055, 2110, 4220, 4931, 9862, 19724, 24655, 49310, 98620, 1040441, 2080882, 4161764, 5202205, 10404410, 20808820]

約数ペア:

[(1, 20808820), (2, 10404410), (4, 5202205), (5, 4161764), (10, 2080882), (20, 1040441), (211, 98620), (422, 49310), (844, 24655), (1055, 19724), (2110, 9862), (4220, 4931)]