20990145

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{5531}}^1$

素因数の和:5573

約数の個数: 32

約数和(自身を含む): 38237184

約数和(自身を除く): 17247039

約数列:

[1, 3, 5, 11, 15, 23, 33, 55, 69, 115, 165, 253, 345, 759, 1265, 3795, 5531, 16593, 27655, 60841, 82965, 127213, 182523, 304205, 381639, 636065, 912615, 1399343, 1908195, 4198029, 6996715, 20990145]

約数ペア:

[(1, 20990145), (3, 6996715), (5, 4198029), (11, 1908195), (15, 1399343), (23, 912615), (33, 636065), (55, 381639), (69, 304205), (115, 182523), (165, 127213), (253, 82965), (345, 60841), (759, 27655), (1265, 16593), (3795, 5531)]