19975285

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{137}}^1\times {\mathrm{241}}^1$

素因数の和:405

約数の個数: 24

約数和(自身を含む): 26650008

約数和(自身を除く): 6674723

約数列:

[1, 5, 11, 55, 121, 137, 241, 605, 685, 1205, 1507, 2651, 7535, 13255, 16577, 29161, 33017, 82885, 145805, 165085, 363187, 1815935, 3995057, 19975285]

約数ペア:

[(1, 19975285), (5, 3995057), (11, 1815935), (55, 363187), (121, 165085), (137, 145805), (241, 82885), (605, 33017), (685, 29161), (1205, 16577), (1507, 13255), (2651, 7535)]