12620840

素因数分解:

$2^3\times 5^1\times {\mathrm{315521}}^1$

素因数の和:315532

約数の個数: 16

約数和(自身を含む): 28396980

約数和(自身を除く): 15776140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 315521, 631042, 1262084, 1577605, 2524168, 3155210, 6310420, 12620840]

約数ペア:

[(1, 12620840), (2, 6310420), (4, 3155210), (5, 2524168), (8, 1577605), (10, 1262084), (20, 631042), (40, 315521)]