21656789

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{131}}^1$

素因数の和:281

約数の個数: 32

約数和(自身を含む): 28892160

約数和(自身を除く): 7235371

約数列:

[1, 7, 11, 19, 77, 113, 131, 133, 209, 791, 917, 1243, 1441, 1463, 2147, 2489, 8701, 10087, 14803, 15029, 17423, 23617, 27379, 103621, 162833, 165319, 191653, 281257, 1139831, 1968799, 3093827, 21656789]

約数ペア:

[(1, 21656789), (7, 3093827), (11, 1968799), (19, 1139831), (77, 281257), (113, 191653), (131, 165319), (133, 162833), (209, 103621), (791, 27379), (917, 23617), (1243, 17423), (1441, 15029), (1463, 14803), (2147, 10087), (2489, 8701)]