31504240

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1999}}^1$

素因数の和:2209

約数の個数: 40

約数和(自身を含む): 73656000

約数和(自身を除く): 42151760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1970, 1999, 3152, 3940, 3998, 7880, 7996, 9995, 15760, 15992, 19990, 31984, 39980, 79960, 159920, 393803, 787606, 1575212, 1969015, 3150424, 3938030, 6300848, 7876060, 15752120, 31504240]

約数ペア:

[(1, 31504240), (2, 15752120), (4, 7876060), (5, 6300848), (8, 3938030), (10, 3150424), (16, 1969015), (20, 1575212), (40, 787606), (80, 393803), (197, 159920), (394, 79960), (788, 39980), (985, 31984), (1576, 19990), (1970, 15992), (1999, 15760), (3152, 9995), (3940, 7996), (3998, 7880)]