21439856

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{78823}}^1$

素因数の和:78848

約数の個数: 20

約数和(自身を含む): 43983792

約数和(自身を除く): 22543936

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 78823, 157646, 315292, 630584, 1261168, 1339991, 2679982, 5359964, 10719928, 21439856]

約数ペア:

[(1, 21439856), (2, 10719928), (4, 5359964), (8, 2679982), (16, 1339991), (17, 1261168), (34, 630584), (68, 315292), (136, 157646), (272, 78823)]