20389655

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{28517}}^1$

素因数の和:28546

約数の個数: 16

約数和(自身を含む): 28746144

約数和(自身を除く): 8356489

約数列:

[1, 5, 11, 13, 55, 65, 143, 715, 28517, 142585, 313687, 370721, 1568435, 1853605, 4077931, 20389655]

約数ペア:

[(1, 20389655), (5, 4077931), (11, 1853605), (13, 1568435), (55, 370721), (65, 313687), (143, 142585), (715, 28517)]