21106539

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{241}}^1\times {\mathrm{263}}^1$

素因数の和:547

約数の個数: 24

約数和(自身を含む): 31560672

約数和(自身を除く): 10454133

約数列:

[1, 3, 9, 37, 111, 241, 263, 333, 723, 789, 2169, 2367, 8917, 9731, 26751, 29193, 63383, 80253, 87579, 190149, 570447, 2345171, 7035513, 21106539]

約数ペア:

[(1, 21106539), (3, 7035513), (9, 2345171), (37, 570447), (111, 190149), (241, 87579), (263, 80253), (333, 63383), (723, 29193), (789, 26751), (2169, 9731), (2367, 8917)]