20802405

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{997}}^1$

素因数の和:1125

約数の個数: 32

約数和(自身を含む): 36215424

約数和(自身を除く): 15413019

約数列:

[1, 3, 5, 13, 15, 39, 65, 107, 195, 321, 535, 997, 1391, 1605, 2991, 4173, 4985, 6955, 12961, 14955, 20865, 38883, 64805, 106679, 194415, 320037, 533395, 1386827, 1600185, 4160481, 6934135, 20802405]

約数ペア:

[(1, 20802405), (3, 6934135), (5, 4160481), (13, 1600185), (15, 1386827), (39, 533395), (65, 320037), (107, 194415), (195, 106679), (321, 64805), (535, 38883), (997, 20865), (1391, 14955), (1605, 12961), (2991, 6955), (4173, 4985)]