20715525

素因数分解:

$3^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{4003}}^1$

素因数の和:4042

約数の個数: 36

約数和(自身を含む): 38726688

約数和(自身を除く): 18011163

約数列:

[1, 3, 5, 9, 15, 23, 25, 45, 69, 75, 115, 207, 225, 345, 575, 1035, 1725, 4003, 5175, 12009, 20015, 36027, 60045, 92069, 100075, 180135, 276207, 300225, 460345, 828621, 900675, 1381035, 2301725, 4143105, 6905175, 20715525]

約数ペア:

[(1, 20715525), (3, 6905175), (5, 4143105), (9, 2301725), (15, 1381035), (23, 900675), (25, 828621), (45, 460345), (69, 300225), (75, 276207), (115, 180135), (207, 100075), (225, 92069), (345, 60045), (575, 36027), (1035, 20015), (1725, 12009), (4003, 5175)]