199989955

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{1999}}^1$

素因数の和:2139

約数の個数: 32

約数和(自身を含む): 279936000

約数和(自身を除く): 79946045

約数列:

[1, 5, 11, 17, 55, 85, 107, 187, 535, 935, 1177, 1819, 1999, 5885, 9095, 9995, 20009, 21989, 33983, 100045, 109945, 169915, 213893, 373813, 1069465, 1869065, 2352823, 3636181, 11764115, 18180905, 39997991, 199989955]

約数ペア:

[(1, 199989955), (5, 39997991), (11, 18180905), (17, 11764115), (55, 3636181), (85, 2352823), (107, 1869065), (187, 1069465), (535, 373813), (935, 213893), (1177, 169915), (1819, 109945), (1999, 100045), (5885, 33983), (9095, 21989), (9995, 20009)]