18719920

素因数分解:

$2^4\times 5^1\times {\mathrm{211}}^1\times {\mathrm{1109}}^1$

素因数の和:1333

約数の個数: 40

約数和(自身を含む): 43769520

約数和(自身を除く): 25049600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 211, 422, 844, 1055, 1109, 1688, 2110, 2218, 3376, 4220, 4436, 5545, 8440, 8872, 11090, 16880, 17744, 22180, 44360, 88720, 233999, 467998, 935996, 1169995, 1871992, 2339990, 3743984, 4679980, 9359960, 18719920]

約数ペア:

[(1, 18719920), (2, 9359960), (4, 4679980), (5, 3743984), (8, 2339990), (10, 1871992), (16, 1169995), (20, 935996), (40, 467998), (80, 233999), (211, 88720), (422, 44360), (844, 22180), (1055, 17744), (1109, 16880), (1688, 11090), (2110, 8872), (2218, 8440), (3376, 5545), (4220, 4436)]