15780921

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{241}}^1$

素因数の和:353

約数の個数: 32

約数和(自身を含む): 24068352

約数和(自身を除く): 8287431

約数列:

[1, 3, 13, 23, 39, 69, 73, 219, 241, 299, 723, 897, 949, 1679, 2847, 3133, 5037, 5543, 9399, 16629, 17593, 21827, 52779, 65481, 72059, 216177, 228709, 404639, 686127, 1213917, 5260307, 15780921]

約数ペア:

[(1, 15780921), (3, 5260307), (13, 1213917), (23, 686127), (39, 404639), (69, 228709), (73, 216177), (219, 72059), (241, 65481), (299, 52779), (723, 21827), (897, 17593), (949, 16629), (1679, 9399), (2847, 5543), (3133, 5037)]