21510945

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{181}}^1$

素因数の和:350

約数の個数: 48

約数和(自身を含む): 39748800

約数和(自身を除く): 18237855

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 139, 171, 181, 285, 417, 543, 695, 855, 905, 1251, 1629, 2085, 2641, 2715, 3439, 6255, 7923, 8145, 10317, 13205, 17195, 23769, 25159, 30951, 39615, 51585, 75477, 118845, 125795, 154755, 226431, 377385, 478021, 1132155, 1434063, 2390105, 4302189, 7170315, 21510945]

約数ペア:

[(1, 21510945), (3, 7170315), (5, 4302189), (9, 2390105), (15, 1434063), (19, 1132155), (45, 478021), (57, 377385), (95, 226431), (139, 154755), (171, 125795), (181, 118845), (285, 75477), (417, 51585), (543, 39615), (695, 30951), (855, 25159), (905, 23769), (1251, 17195), (1629, 13205), (2085, 10317), (2641, 8145), (2715, 7923), (3439, 6255)]