20921908

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{17377}}^1$

素因数の和:17431

約数の個数: 24

約数和(自身を含む): 42819392

約数和(自身を除く): 21897484

約数列:

[1, 2, 4, 7, 14, 28, 43, 86, 172, 301, 602, 1204, 17377, 34754, 69508, 121639, 243278, 486556, 747211, 1494422, 2988844, 5230477, 10460954, 20921908]

約数ペア:

[(1, 20921908), (2, 10460954), (4, 5230477), (7, 2988844), (14, 1494422), (28, 747211), (43, 486556), (86, 243278), (172, 121639), (301, 69508), (602, 34754), (1204, 17377)]