87217975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^2$

素因数の和:224

約数の個数: 36

約数和(自身を含む): 120705816

約数和(自身を除く): 33487841

約数列:

[1, 5, 13, 25, 43, 65, 79, 215, 325, 395, 559, 1027, 1075, 1975, 2795, 3397, 5135, 6241, 13975, 16985, 25675, 31205, 44161, 81133, 84925, 156025, 220805, 268363, 405665, 1104025, 1341815, 2028325, 3488719, 6709075, 17443595, 87217975]

約数ペア:

[(1, 87217975), (5, 17443595), (13, 6709075), (25, 3488719), (43, 2028325), (65, 1341815), (79, 1104025), (215, 405665), (325, 268363), (395, 220805), (559, 156025), (1027, 84925), (1075, 81133), (1975, 44161), (2795, 31205), (3397, 25675), (5135, 16985), (6241, 13975)]