21609185

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{107}}^1\times {\mathrm{239}}^1$

素因数の和:377

約数の個数: 24

約数和(自身を含む): 28460160

約数和(自身を除く): 6850975

約数列:

[1, 5, 13, 65, 107, 169, 239, 535, 845, 1195, 1391, 3107, 6955, 15535, 18083, 25573, 40391, 90415, 127865, 201955, 332449, 1662245, 4321837, 21609185]

約数ペア:

[(1, 21609185), (5, 4321837), (13, 1662245), (65, 332449), (107, 201955), (169, 127865), (239, 90415), (535, 40391), (845, 25573), (1195, 18083), (1391, 15535), (3107, 6955)]