25397281

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{397}}^1$

素因数の和:473

約数の個数: 32

約数和(自身を含む): 33877760

約数和(自身を除く): 8480479

約数列:

[1, 7, 13, 19, 37, 91, 133, 247, 259, 397, 481, 703, 1729, 2779, 3367, 4921, 5161, 7543, 9139, 14689, 36127, 52801, 63973, 98059, 102823, 190957, 279091, 686413, 1336699, 1953637, 3628183, 25397281]

約数ペア:

[(1, 25397281), (7, 3628183), (13, 1953637), (19, 1336699), (37, 686413), (91, 279091), (133, 190957), (247, 102823), (259, 98059), (397, 63973), (481, 52801), (703, 36127), (1729, 14689), (2779, 9139), (3367, 7543), (4921, 5161)]