20879937

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{251}}^1$

素因数の和:355

約数の個数: 40

約数和(自身を含む): 34151040

約数和(自身を除く): 13271103

約数列:

[1, 3, 9, 13, 27, 39, 79, 81, 117, 237, 251, 351, 711, 753, 1027, 1053, 2133, 2259, 3081, 3263, 6399, 6777, 9243, 9789, 19829, 20331, 27729, 29367, 59487, 83187, 88101, 178461, 257777, 264303, 535383, 773331, 1606149, 2319993, 6959979, 20879937]

約数ペア:

[(1, 20879937), (3, 6959979), (9, 2319993), (13, 1606149), (27, 773331), (39, 535383), (79, 264303), (81, 257777), (117, 178461), (237, 88101), (251, 83187), (351, 59487), (711, 29367), (753, 27729), (1027, 20331), (1053, 19829), (2133, 9789), (2259, 9243), (3081, 6777), (3263, 6399)]