128016125

素因数分解:

$5^3\times {\mathrm{61}}^1\times {\mathrm{103}}^1\times {\mathrm{163}}^1$

素因数の和:342

約数の個数: 32

約数和(自身を含む): 164965632

約数和(自身を除く): 36949507

約数列:

[1, 5, 25, 61, 103, 125, 163, 305, 515, 815, 1525, 2575, 4075, 6283, 7625, 9943, 12875, 16789, 20375, 31415, 49715, 83945, 157075, 248575, 419725, 785375, 1024129, 1242875, 2098625, 5120645, 25603225, 128016125]

約数ペア:

[(1, 128016125), (5, 25603225), (25, 5120645), (61, 2098625), (103, 1242875), (125, 1024129), (163, 785375), (305, 419725), (515, 248575), (815, 157075), (1525, 83945), (2575, 49715), (4075, 31415), (6283, 20375), (7625, 16789), (9943, 12875)]