20391455

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{347}}^1$

素因数の和:455

約数の個数: 32

約数和(自身を含む): 29666304

約数和(自身を除く): 9274849

約数列:

[1, 5, 7, 23, 35, 73, 115, 161, 347, 365, 511, 805, 1679, 1735, 2429, 2555, 7981, 8395, 11753, 12145, 25331, 39905, 55867, 58765, 126655, 177317, 279335, 582613, 886585, 2913065, 4078291, 20391455]

約数ペア:

[(1, 20391455), (5, 4078291), (7, 2913065), (23, 886585), (35, 582613), (73, 279335), (115, 177317), (161, 126655), (347, 58765), (365, 55867), (511, 39905), (805, 25331), (1679, 12145), (1735, 11753), (2429, 8395), (2555, 7981)]