21819664

素因数分解:

$2^4\times {\mathrm{139}}^1\times {\mathrm{9811}}^1$

素因数の和:9958

約数の個数: 20

約数和(自身を含む): 42584080

約数和(自身を除く): 20764416

約数列:

[1, 2, 4, 8, 16, 139, 278, 556, 1112, 2224, 9811, 19622, 39244, 78488, 156976, 1363729, 2727458, 5454916, 10909832, 21819664]

約数ペア:

[(1, 21819664), (2, 10909832), (4, 5454916), (8, 2727458), (16, 1363729), (139, 156976), (278, 78488), (556, 39244), (1112, 19622), (2224, 9811)]