21309725

素因数分解:

$5^2\times {\mathrm{43}}^2\times {\mathrm{461}}^1$

素因数の和:557

約数の個数: 18

約数和(自身を含む): 27111546

約数和(自身を除く): 5801821

約数列:

[1, 5, 25, 43, 215, 461, 1075, 1849, 2305, 9245, 11525, 19823, 46225, 99115, 495575, 852389, 4261945, 21309725]

約数ペア:

[(1, 21309725), (5, 4261945), (25, 852389), (43, 495575), (215, 99115), (461, 46225), (1075, 19823), (1849, 11525), (2305, 9245)]