128897979

素因数分解:

$3^1\times 7^2\times {\mathrm{151}}^1\times {\mathrm{5807}}^1$

素因数の和:5975

約数の個数: 24

約数和(自身を含む): 201282048

約数和(自身を除く): 72384069

約数列:

[1, 3, 7, 21, 49, 147, 151, 453, 1057, 3171, 5807, 7399, 17421, 22197, 40649, 121947, 284543, 853629, 876857, 2630571, 6137999, 18413997, 42965993, 128897979]

約数ペア:

[(1, 128897979), (3, 42965993), (7, 18413997), (21, 6137999), (49, 2630571), (147, 876857), (151, 853629), (453, 284543), (1057, 121947), (3171, 40649), (5807, 22197), (7399, 17421)]