20280795

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1$

素因数の和:355

約数の個数: 32

約数和(自身を含む): 33384960

約数和(自身を除く): 13104165

約数列:

[1, 3, 5, 15, 71, 137, 139, 213, 355, 411, 417, 685, 695, 1065, 2055, 2085, 9727, 9869, 19043, 29181, 29607, 48635, 49345, 57129, 95215, 145905, 148035, 285645, 1352053, 4056159, 6760265, 20280795]

約数ペア:

[(1, 20280795), (3, 6760265), (5, 4056159), (15, 1352053), (71, 285645), (137, 148035), (139, 145905), (213, 95215), (355, 57129), (411, 49345), (417, 48635), (685, 29607), (695, 29181), (1065, 19043), (2055, 9869), (2085, 9727)]