21801645

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{593}}^1$

素因数の和:666

約数の個数: 48

約数和(自身を含む): 40772160

約数和(自身を除く): 18970515

約数列:

[1, 3, 5, 9, 15, 19, 43, 45, 57, 95, 129, 171, 215, 285, 387, 593, 645, 817, 855, 1779, 1935, 2451, 2965, 4085, 5337, 7353, 8895, 11267, 12255, 25499, 26685, 33801, 36765, 56335, 76497, 101403, 127495, 169005, 229491, 382485, 484481, 507015, 1147455, 1453443, 2422405, 4360329, 7267215, 21801645]

約数ペア:

[(1, 21801645), (3, 7267215), (5, 4360329), (9, 2422405), (15, 1453443), (19, 1147455), (43, 507015), (45, 484481), (57, 382485), (95, 229491), (129, 169005), (171, 127495), (215, 101403), (285, 76497), (387, 56335), (593, 36765), (645, 33801), (817, 26685), (855, 25499), (1779, 12255), (1935, 11267), (2451, 8895), (2965, 7353), (4085, 5337)]