21785778

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{4021}}^1$

素因数の和:4079

約数の個数: 48

約数和(自身を含む): 55214016

約数和(自身を除く): 33428238

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 43, 63, 86, 126, 129, 258, 301, 387, 602, 774, 903, 1806, 2709, 4021, 5418, 8042, 12063, 24126, 28147, 36189, 56294, 72378, 84441, 168882, 172903, 253323, 345806, 506646, 518709, 1037418, 1210321, 1556127, 2420642, 3112254, 3630963, 7261926, 10892889, 21785778]

約数ペア:

[(1, 21785778), (2, 10892889), (3, 7261926), (6, 3630963), (7, 3112254), (9, 2420642), (14, 1556127), (18, 1210321), (21, 1037418), (42, 518709), (43, 506646), (63, 345806), (86, 253323), (126, 172903), (129, 168882), (258, 84441), (301, 72378), (387, 56294), (602, 36189), (774, 28147), (903, 24126), (1806, 12063), (2709, 8042), (4021, 5418)]