15721240

素因数分解:

$2^3\times 5^1\times {\mathrm{393031}}^1$

素因数の和:393042

約数の個数: 16

約数和(自身を含む): 35372880

約数和(自身を除く): 19651640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 393031, 786062, 1572124, 1965155, 3144248, 3930310, 7860620, 15721240]

約数ペア:

[(1, 15721240), (2, 7860620), (4, 3930310), (5, 3144248), (8, 1965155), (10, 1572124), (20, 786062), (40, 393031)]