21352725

素因数分解:

$3^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{2207}}^1$

素因数の和:2266

約数の個数: 36

約数和(自身を含む): 39152256

約数和(自身を除く): 17799531

約数列:

[1, 3, 5, 9, 15, 25, 43, 45, 75, 129, 215, 225, 387, 645, 1075, 1935, 2207, 3225, 6621, 9675, 11035, 19863, 33105, 55175, 94901, 99315, 165525, 284703, 474505, 496575, 854109, 1423515, 2372525, 4270545, 7117575, 21352725]

約数ペア:

[(1, 21352725), (3, 7117575), (5, 4270545), (9, 2372525), (15, 1423515), (25, 854109), (43, 496575), (45, 474505), (75, 284703), (129, 165525), (215, 99315), (225, 94901), (387, 55175), (645, 33105), (1075, 19863), (1935, 11035), (2207, 9675), (3225, 6621)]