21271568

素因数分解:

$2^4\times {\mathrm{109}}^1\times {\mathrm{12197}}^1$

素因数の和:12314

約数の個数: 20

約数和(自身を含む): 41595180

約数和(自身を除く): 20323612

約数列:

[1, 2, 4, 8, 16, 109, 218, 436, 872, 1744, 12197, 24394, 48788, 97576, 195152, 1329473, 2658946, 5317892, 10635784, 21271568]

約数ペア:

[(1, 21271568), (2, 10635784), (4, 5317892), (8, 2658946), (16, 1329473), (109, 195152), (218, 97576), (436, 48788), (872, 24394), (1744, 12197)]