128509520

素因数分解:

$2^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{10781}}^1$

素因数の和:10943

約数の個数: 40

約数和(自身を含む): 300817800

約数和(自身を除く): 172308280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 149, 298, 596, 745, 1192, 1490, 2384, 2980, 5960, 10781, 11920, 21562, 43124, 53905, 86248, 107810, 172496, 215620, 431240, 862480, 1606369, 3212738, 6425476, 8031845, 12850952, 16063690, 25701904, 32127380, 64254760, 128509520]

約数ペア:

[(1, 128509520), (2, 64254760), (4, 32127380), (5, 25701904), (8, 16063690), (10, 12850952), (16, 8031845), (20, 6425476), (40, 3212738), (80, 1606369), (149, 862480), (298, 431240), (596, 215620), (745, 172496), (1192, 107810), (1490, 86248), (2384, 53905), (2980, 43124), (5960, 21562), (10781, 11920)]