20919005

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{1621}}^1$

素因数の和:1744

約数の個数: 16

約数和(自身を含む): 26276400

約数和(自身を除く): 5357395

約数列:

[1, 5, 29, 89, 145, 445, 1621, 2581, 8105, 12905, 47009, 144269, 235045, 721345, 4183801, 20919005]

約数ペア:

[(1, 20919005), (5, 4183801), (29, 721345), (89, 235045), (145, 144269), (445, 47009), (1621, 12905), (2581, 8105)]