20123271

素因数分解:

$3^2\times 7^2\times {\mathrm{45631}}^1$

素因数の和:45651

約数の個数: 18

約数和(自身を含む): 33813312

約数和(自身を除く): 13690041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 45631, 136893, 319417, 410679, 958251, 2235919, 2874753, 6707757, 20123271]

約数ペア:

[(1, 20123271), (3, 6707757), (7, 2874753), (9, 2235919), (21, 958251), (49, 410679), (63, 319417), (147, 136893), (441, 45631)]