21905995

素因数分解:

$5^1\times {\mathrm{31}}^2\times {\mathrm{47}}^1\times {\mathrm{97}}^1$

素因数の和:211

約数の個数: 24

約数和(自身を含む): 28026432

約数和(自身を除く): 6120437

約数列:

[1, 5, 31, 47, 97, 155, 235, 485, 961, 1457, 3007, 4559, 4805, 7285, 15035, 22795, 45167, 93217, 141329, 225835, 466085, 706645, 4381199, 21905995]

約数ペア:

[(1, 21905995), (5, 4381199), (31, 706645), (47, 466085), (97, 225835), (155, 141329), (235, 93217), (485, 45167), (961, 22795), (1457, 15035), (3007, 7285), (4559, 4805)]