19904313

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{83}}^1$

素因数の和:166

約数の個数: 48

約数和(自身を含む): 32465664

約数和(自身を除く): 12561351

約数列:

[1, 3, 11, 13, 33, 39, 43, 83, 129, 143, 169, 249, 429, 473, 507, 559, 913, 1079, 1419, 1677, 1859, 2739, 3237, 3569, 5577, 6149, 7267, 10707, 11869, 14027, 18447, 21801, 35607, 39259, 42081, 46397, 79937, 117777, 139191, 154297, 239811, 462891, 510367, 603161, 1531101, 1809483, 6634771, 19904313]

約数ペア:

[(1, 19904313), (3, 6634771), (11, 1809483), (13, 1531101), (33, 603161), (39, 510367), (43, 462891), (83, 239811), (129, 154297), (143, 139191), (169, 117777), (249, 79937), (429, 46397), (473, 42081), (507, 39259), (559, 35607), (913, 21801), (1079, 18447), (1419, 14027), (1677, 11869), (1859, 10707), (2739, 7267), (3237, 6149), (3569, 5577)]