128400727

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{103}}^2$

素因数の和:252

約数の個数: 36

約数和(自身を含む): 170979480

約数和(自身を除く): 42578753

約数列:

[1, 7, 13, 19, 49, 91, 103, 133, 247, 637, 721, 931, 1339, 1729, 1957, 5047, 9373, 10609, 12103, 13699, 25441, 65611, 74263, 95893, 137917, 178087, 201571, 519841, 965419, 1246609, 1410997, 2620423, 6757933, 9876979, 18342961, 128400727]

約数ペア:

[(1, 128400727), (7, 18342961), (13, 9876979), (19, 6757933), (49, 2620423), (91, 1410997), (103, 1246609), (133, 965419), (247, 519841), (637, 201571), (721, 178087), (931, 137917), (1339, 95893), (1729, 74263), (1957, 65611), (5047, 25441), (9373, 13699), (10609, 12103)]