21196880

素因数分解:

$2^4\times 5^1\times {\mathrm{264961}}^1$

素因数の和:264974

約数の個数: 20

約数和(自身を含む): 49282932

約数和(自身を除く): 28086052

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264961, 529922, 1059844, 1324805, 2119688, 2649610, 4239376, 5299220, 10598440, 21196880]

約数ペア:

[(1, 21196880), (2, 10598440), (4, 5299220), (5, 4239376), (8, 2649610), (10, 2119688), (16, 1324805), (20, 1059844), (40, 529922), (80, 264961)]