18716481

素因数分解:

$3^3\times 7^3\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:120

約数の個数: 64

約数和(自身を含む): 33792000

約数和(自身を除く): 15075519

約数列:

[1, 3, 7, 9, 21, 27, 43, 47, 49, 63, 129, 141, 147, 189, 301, 329, 343, 387, 423, 441, 903, 987, 1029, 1161, 1269, 1323, 2021, 2107, 2303, 2709, 2961, 3087, 6063, 6321, 6909, 8127, 8883, 9261, 14147, 14749, 16121, 18189, 18963, 20727, 42441, 44247, 48363, 54567, 56889, 62181, 99029, 127323, 132741, 145089, 297087, 381969, 398223, 435267, 693203, 891261, 2079609, 2673783, 6238827, 18716481]

約数ペア:

[(1, 18716481), (3, 6238827), (7, 2673783), (9, 2079609), (21, 891261), (27, 693203), (43, 435267), (47, 398223), (49, 381969), (63, 297087), (129, 145089), (141, 132741), (147, 127323), (189, 99029), (301, 62181), (329, 56889), (343, 54567), (387, 48363), (423, 44247), (441, 42441), (903, 20727), (987, 18963), (1029, 18189), (1161, 16121), (1269, 14749), (1323, 14147), (2021, 9261), (2107, 8883), (2303, 8127), (2709, 6909), (2961, 6321), (3087, 6063)]