21390540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{356509}}^1$

素因数の和:356521

約数の個数: 24

約数和(自身を含む): 59893680

約数和(自身を除く): 38503140

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 356509, 713018, 1069527, 1426036, 1782545, 2139054, 3565090, 4278108, 5347635, 7130180, 10695270, 21390540]

約数ペア:

[(1, 21390540), (2, 10695270), (3, 7130180), (4, 5347635), (5, 4278108), (6, 3565090), (10, 2139054), (12, 1782545), (15, 1426036), (20, 1069527), (30, 713018), (60, 356509)]