20647240

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16651}}^1$

素因数の和:16693

約数の個数: 32

約数和(自身を含む): 47957760

約数和(自身を除く): 27310520

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16651, 33302, 66604, 83255, 133208, 166510, 333020, 516181, 666040, 1032362, 2064724, 2580905, 4129448, 5161810, 10323620, 20647240]

約数ペア:

[(1, 20647240), (2, 10323620), (4, 5161810), (5, 4129448), (8, 2580905), (10, 2064724), (20, 1032362), (31, 666040), (40, 516181), (62, 333020), (124, 166510), (155, 133208), (248, 83255), (310, 66604), (620, 33302), (1240, 16651)]