81717560

素因数分解:

$2^3\times 5^1\times {\mathrm{149}}^1\times {\mathrm{13711}}^1$

素因数の和:13871

約数の個数: 32

約数和(自身を含む): 185112000

約数和(自身を除く): 103394440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 149, 298, 596, 745, 1192, 1490, 2980, 5960, 13711, 27422, 54844, 68555, 109688, 137110, 274220, 548440, 2042939, 4085878, 8171756, 10214695, 16343512, 20429390, 40858780, 81717560]

約数ペア:

[(1, 81717560), (2, 40858780), (4, 20429390), (5, 16343512), (8, 10214695), (10, 8171756), (20, 4085878), (40, 2042939), (149, 548440), (298, 274220), (596, 137110), (745, 109688), (1192, 68555), (1490, 54844), (2980, 27422), (5960, 13711)]