20284240

素因数分解:

$2^4\times 5^1\times {\mathrm{253553}}^1$

素因数の和:253566

約数の個数: 20

約数和(自身を含む): 47161044

約数和(自身を除く): 26876804

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 253553, 507106, 1014212, 1267765, 2028424, 2535530, 4056848, 5071060, 10142120, 20284240]

約数ペア:

[(1, 20284240), (2, 10142120), (4, 5071060), (5, 4056848), (8, 2535530), (10, 2028424), (16, 1267765), (20, 1014212), (40, 507106), (80, 253553)]