21526947

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 36167040

約数和(自身を除く): 14640093

約数列:

[1, 3, 9, 13, 17, 39, 51, 79, 117, 137, 153, 221, 237, 411, 663, 711, 1027, 1233, 1343, 1781, 1989, 2329, 3081, 4029, 5343, 6987, 9243, 10823, 12087, 16029, 17459, 20961, 30277, 32469, 52377, 90831, 97407, 140699, 157131, 183991, 272493, 422097, 551973, 1266291, 1655919, 2391883, 7175649, 21526947]

約数ペア:

[(1, 21526947), (3, 7175649), (9, 2391883), (13, 1655919), (17, 1266291), (39, 551973), (51, 422097), (79, 272493), (117, 183991), (137, 157131), (153, 140699), (221, 97407), (237, 90831), (411, 52377), (663, 32469), (711, 30277), (1027, 20961), (1233, 17459), (1343, 16029), (1781, 12087), (1989, 10823), (2329, 9243), (3081, 6987), (4029, 5343)]