19742865

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{557}}^1$

素因数の和:721

約数の個数: 32

約数和(自身を含む): 33747840

約数和(自身を除く): 14004975

約数列:

[1, 3, 5, 15, 17, 51, 85, 139, 255, 417, 557, 695, 1671, 2085, 2363, 2785, 7089, 8355, 9469, 11815, 28407, 35445, 47345, 77423, 142035, 232269, 387115, 1161345, 1316191, 3948573, 6580955, 19742865]

約数ペア:

[(1, 19742865), (3, 6580955), (5, 3948573), (15, 1316191), (17, 1161345), (51, 387115), (85, 232269), (139, 142035), (255, 77423), (417, 47345), (557, 35445), (695, 28407), (1671, 11815), (2085, 9469), (2363, 8355), (2785, 7089)]