21638739

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{163}}^1$

素因数の和:339

約数の個数: 32

約数和(自身を含む): 32590080

約数和(自身を除く): 10951341

約数列:

[1, 3, 17, 19, 51, 57, 137, 163, 323, 411, 489, 969, 2329, 2603, 2771, 3097, 6987, 7809, 8313, 9291, 22331, 44251, 52649, 66993, 132753, 157947, 379627, 424289, 1138881, 1272867, 7212913, 21638739]

約数ペア:

[(1, 21638739), (3, 7212913), (17, 1272867), (19, 1138881), (51, 424289), (57, 379627), (137, 157947), (163, 132753), (323, 66993), (411, 52649), (489, 44251), (969, 22331), (2329, 9291), (2603, 8313), (2771, 7809), (3097, 6987)]