19901205

素因数分解:

$3^2\times 5^1\times {\mathrm{467}}^1\times {\mathrm{947}}^1$

素因数の和:1425

約数の個数: 24

約数和(自身を含む): 34605792

約数和(自身を除く): 14704587

約数列:

[1, 3, 5, 9, 15, 45, 467, 947, 1401, 2335, 2841, 4203, 4735, 7005, 8523, 14205, 21015, 42615, 442249, 1326747, 2211245, 3980241, 6633735, 19901205]

約数ペア:

[(1, 19901205), (3, 6633735), (5, 3980241), (9, 2211245), (15, 1326747), (45, 442249), (467, 42615), (947, 21015), (1401, 14205), (2335, 8523), (2841, 7005), (4203, 4735)]