21783411

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{151}}^1$

素因数の和:313

約数の個数: 40

約数和(自身を含む): 35533344

約数和(自身を除く): 13749933

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 137, 151, 351, 411, 453, 1053, 1233, 1359, 1781, 1963, 3699, 4077, 5343, 5889, 11097, 12231, 16029, 17667, 20687, 48087, 53001, 62061, 144261, 159003, 186183, 268931, 558549, 806793, 1675647, 2420379, 7261137, 21783411]

約数ペア:

[(1, 21783411), (3, 7261137), (9, 2420379), (13, 1675647), (27, 806793), (39, 558549), (81, 268931), (117, 186183), (137, 159003), (151, 144261), (351, 62061), (411, 53001), (453, 48087), (1053, 20687), (1233, 17667), (1359, 16029), (1781, 12231), (1963, 11097), (3699, 5889), (4077, 5343)]