81391960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{193}}^1\times {\mathrm{811}}^1$

素因数の和:1028

約数の個数: 64

約数和(自身を含む): 198485280

約数和(自身を除く): 117093320

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 193, 260, 386, 520, 772, 811, 965, 1544, 1622, 1930, 2509, 3244, 3860, 4055, 5018, 6488, 7720, 8110, 10036, 10543, 12545, 16220, 20072, 21086, 25090, 32440, 42172, 50180, 52715, 84344, 100360, 105430, 156523, 210860, 313046, 421720, 626092, 782615, 1252184, 1565230, 2034799, 3130460, 4069598, 6260920, 8139196, 10173995, 16278392, 20347990, 40695980, 81391960]

約数ペア:

[(1, 81391960), (2, 40695980), (4, 20347990), (5, 16278392), (8, 10173995), (10, 8139196), (13, 6260920), (20, 4069598), (26, 3130460), (40, 2034799), (52, 1565230), (65, 1252184), (104, 782615), (130, 626092), (193, 421720), (260, 313046), (386, 210860), (520, 156523), (772, 105430), (811, 100360), (965, 84344), (1544, 52715), (1622, 50180), (1930, 42172), (2509, 32440), (3244, 25090), (3860, 21086), (4055, 20072), (5018, 16220), (6488, 12545), (7720, 10543), (8110, 10036)]