18704870

素因数分解:

$2^1\times 5^1\times {\mathrm{643}}^1\times {\mathrm{2909}}^1$

素因数の和:3559

約数の個数: 16

約数和(自身を含む): 33732720

約数和(自身を除く): 15027850

約数列:

[1, 2, 5, 10, 643, 1286, 2909, 3215, 5818, 6430, 14545, 29090, 1870487, 3740974, 9352435, 18704870]

約数ペア:

[(1, 18704870), (2, 9352435), (5, 3740974), (10, 1870487), (643, 29090), (1286, 14545), (2909, 6430), (3215, 5818)]