21371890

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{125717}}^1$

素因数の和:125741

約数の個数: 16

約数和(自身を含む): 40732632

約数和(自身を除く): 19360742

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 125717, 251434, 628585, 1257170, 2137189, 4274378, 10685945, 21371890]

約数ペア:

[(1, 21371890), (2, 10685945), (5, 4274378), (10, 2137189), (17, 1257170), (34, 628585), (85, 251434), (170, 125717)]