20385105

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{977}}^1$

素因数の和:1105

約数の個数: 32

約数和(自身を含む): 35489664

約数和(自身を除く): 15104559

約数列:

[1, 3, 5, 13, 15, 39, 65, 107, 195, 321, 535, 977, 1391, 1605, 2931, 4173, 4885, 6955, 12701, 14655, 20865, 38103, 63505, 104539, 190515, 313617, 522695, 1359007, 1568085, 4077021, 6795035, 20385105]

約数ペア:

[(1, 20385105), (3, 6795035), (5, 4077021), (13, 1568085), (15, 1359007), (39, 522695), (65, 313617), (107, 190515), (195, 104539), (321, 63505), (535, 38103), (977, 20865), (1391, 14655), (1605, 12701), (2931, 6955), (4173, 4885)]