21488175

素因数分解:

$3^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{2221}}^1$

素因数の和:2280

約数の個数: 36

約数和(自身を含む): 39400504

約数和(自身を除く): 17912329

約数列:

[1, 3, 5, 9, 15, 25, 43, 45, 75, 129, 215, 225, 387, 645, 1075, 1935, 2221, 3225, 6663, 9675, 11105, 19989, 33315, 55525, 95503, 99945, 166575, 286509, 477515, 499725, 859527, 1432545, 2387575, 4297635, 7162725, 21488175]

約数ペア:

[(1, 21488175), (3, 7162725), (5, 4297635), (9, 2387575), (15, 1432545), (25, 859527), (43, 499725), (45, 477515), (75, 286509), (129, 166575), (215, 99945), (225, 95503), (387, 55525), (645, 33315), (1075, 19989), (1935, 11105), (2221, 9675), (3225, 6663)]