21071690

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{72661}}^1$

素因数の和:72697

約数の個数: 16

約数和(自身を含む): 39237480

約数和(自身を除く): 18165790

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 72661, 145322, 363305, 726610, 2107169, 4214338, 10535845, 21071690]

約数ペア:

[(1, 21071690), (2, 10535845), (5, 4214338), (10, 2107169), (29, 726610), (58, 363305), (145, 145322), (290, 72661)]