21711890

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{127717}}^1$

素因数の和:127741

約数の個数: 16

約数和(自身を含む): 41380632

約数和(自身を除く): 19668742

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 127717, 255434, 638585, 1277170, 2171189, 4342378, 10855945, 21711890]

約数ペア:

[(1, 21711890), (2, 10855945), (5, 4342378), (10, 2171189), (17, 1277170), (34, 638585), (85, 255434), (170, 127717)]