21193855

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{227}}^1\times {\mathrm{263}}^1$

素因数の和:566

約数の個数: 16

約数和(自身を含む): 26002944

約数和(自身を除く): 4809089

約数列:

[1, 5, 71, 227, 263, 355, 1135, 1315, 16117, 18673, 59701, 80585, 93365, 298505, 4238771, 21193855]

約数ペア:

[(1, 21193855), (5, 4238771), (71, 298505), (227, 93365), (263, 80585), (355, 59701), (1135, 18673), (1315, 16117)]