21018137

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{347}}^1\times {\mathrm{509}}^1$

素因数の和:880

約数の個数: 16

約数和(自身を含む): 25557120

約数和(自身を除く): 4538983

約数列:

[1, 7, 17, 119, 347, 509, 2429, 3563, 5899, 8653, 41293, 60571, 176623, 1236361, 3002591, 21018137]

約数ペア:

[(1, 21018137), (7, 3002591), (17, 1236361), (119, 176623), (347, 60571), (509, 41293), (2429, 8653), (3563, 5899)]