21656349

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:183

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 17050851

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 71, 79, 99, 117, 143, 213, 237, 297, 351, 429, 639, 711, 781, 869, 923, 1027, 1287, 1917, 2133, 2343, 2607, 2769, 3081, 3861, 5609, 7029, 7821, 8307, 9243, 10153, 11297, 16827, 21087, 23463, 24921, 27729, 30459, 33891, 50481, 61699, 72917, 91377, 101673, 151443, 185097, 218751, 274131, 305019, 555291, 656253, 802087, 1665873, 1968759, 2406261, 7218783, 21656349]

約数ペア:

[(1, 21656349), (3, 7218783), (9, 2406261), (11, 1968759), (13, 1665873), (27, 802087), (33, 656253), (39, 555291), (71, 305019), (79, 274131), (99, 218751), (117, 185097), (143, 151443), (213, 101673), (237, 91377), (297, 72917), (351, 61699), (429, 50481), (639, 33891), (711, 30459), (781, 27729), (869, 24921), (923, 23463), (1027, 21087), (1287, 16827), (1917, 11297), (2133, 10153), (2343, 9243), (2607, 8307), (2769, 7821), (3081, 7029), (3861, 5609)]