20180259

素因数分解:

$3^4\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:134

約数の個数: 60

約数和(自身を含む): 34760880

約数和(自身を除く): 14580621

約数列:

[1, 3, 9, 11, 27, 29, 33, 71, 81, 87, 99, 121, 213, 261, 297, 319, 363, 639, 781, 783, 891, 957, 1089, 1917, 2059, 2343, 2349, 2871, 3267, 3509, 5751, 6177, 7029, 8591, 8613, 9801, 10527, 18531, 21087, 22649, 25773, 25839, 31581, 55593, 63261, 67947, 77319, 94743, 166779, 203841, 231957, 249139, 284229, 611523, 695871, 747417, 1834569, 2242251, 6726753, 20180259]

約数ペア:

[(1, 20180259), (3, 6726753), (9, 2242251), (11, 1834569), (27, 747417), (29, 695871), (33, 611523), (71, 284229), (81, 249139), (87, 231957), (99, 203841), (121, 166779), (213, 94743), (261, 77319), (297, 67947), (319, 63261), (363, 55593), (639, 31581), (781, 25839), (783, 25773), (891, 22649), (957, 21087), (1089, 18531), (1917, 10527), (2059, 9801), (2343, 8613), (2349, 8591), (2871, 7029), (3267, 6177), (3509, 5751)]