20541717

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{131}}^2$

素因数の和:294

約数の個数: 36

約数和(自身を含む): 35969440

約数和(自身を除く): 15427723

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 131, 133, 171, 393, 399, 917, 1179, 1197, 2489, 2751, 7467, 8253, 17161, 17423, 22401, 51483, 52269, 120127, 154449, 156807, 326059, 360381, 978177, 1081143, 2282413, 2934531, 6847239, 20541717]

約数ペア:

[(1, 20541717), (3, 6847239), (7, 2934531), (9, 2282413), (19, 1081143), (21, 978177), (57, 360381), (63, 326059), (131, 156807), (133, 154449), (171, 120127), (393, 52269), (399, 51483), (917, 22401), (1179, 17423), (1197, 17161), (2489, 8253), (2751, 7467)]