208065915

素因数分解:

$3^4\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1999}}^1$

素因数の和:2273

約数の個数: 40

約数和(自身を含む): 374616000

約数和(自身を除く): 166550085

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 257, 405, 771, 1285, 1999, 2313, 3855, 5997, 6939, 9995, 11565, 17991, 20817, 29985, 34695, 53973, 89955, 104085, 161919, 269865, 513743, 809595, 1541229, 2568715, 4623687, 7706145, 13871061, 23118435, 41613183, 69355305, 208065915]

約数ペア:

[(1, 208065915), (3, 69355305), (5, 41613183), (9, 23118435), (15, 13871061), (27, 7706145), (45, 4623687), (81, 2568715), (135, 1541229), (257, 809595), (405, 513743), (771, 269865), (1285, 161919), (1999, 104085), (2313, 89955), (3855, 53973), (5997, 34695), (6939, 29985), (9995, 20817), (11565, 17991)]