20402755

素因数分解:

$5^1\times {\mathrm{103}}^1\times {\mathrm{173}}^1\times {\mathrm{229}}^1$

素因数の和:510

約数の個数: 16

約数和(自身を含む): 24972480

約数和(自身を除く): 4569725

約数列:

[1, 5, 103, 173, 229, 515, 865, 1145, 17819, 23587, 39617, 89095, 117935, 198085, 4080551, 20402755]

約数ペア:

[(1, 20402755), (5, 4080551), (103, 198085), (173, 117935), (229, 89095), (515, 39617), (865, 23587), (1145, 17819)]