20921435

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^2\times {\mathrm{73}}^1$

素因数の和:195

約数の個数: 24

約数和(自身を含む): 26895744

約数和(自身を除く): 5974309

約数列:

[1, 5, 31, 43, 73, 155, 215, 365, 1333, 1849, 2263, 3139, 6665, 9245, 11315, 15695, 57319, 97309, 134977, 286595, 486545, 674885, 4184287, 20921435]

約数ペア:

[(1, 20921435), (5, 4184287), (31, 674885), (43, 486545), (73, 286595), (155, 134977), (215, 97309), (365, 57319), (1333, 15695), (1849, 11315), (2263, 9245), (3139, 6665)]