20506871

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{131}}^1$

素因数の和:275

約数の個数: 32

約数和(自身を含む): 27371520

約数和(自身を除く): 6864649

約数列:

[1, 7, 11, 19, 77, 107, 131, 133, 209, 749, 917, 1177, 1441, 1463, 2033, 2489, 8239, 10087, 14017, 14231, 17423, 22363, 27379, 98119, 154187, 156541, 191653, 266323, 1079309, 1864261, 2929553, 20506871]

約数ペア:

[(1, 20506871), (7, 2929553), (11, 1864261), (19, 1079309), (77, 266323), (107, 191653), (131, 156541), (133, 154187), (209, 98119), (749, 27379), (917, 22363), (1177, 17423), (1441, 14231), (1463, 14017), (2033, 10087), (2489, 8239)]