21402540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{118903}}^1$

素因数の和:118918

約数の個数: 36

約数和(自身を含む): 64921584

約数和(自身を除く): 43519044

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 118903, 237806, 356709, 475612, 594515, 713418, 1070127, 1189030, 1426836, 1783545, 2140254, 2378060, 3567090, 4280508, 5350635, 7134180, 10701270, 21402540]

約数ペア:

[(1, 21402540), (2, 10701270), (3, 7134180), (4, 5350635), (5, 4280508), (6, 3567090), (9, 2378060), (10, 2140254), (12, 1783545), (15, 1426836), (18, 1189030), (20, 1070127), (30, 713418), (36, 594515), (45, 475612), (60, 356709), (90, 237806), (180, 118903)]