21271305

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{941}}^1$

素因数の和:1097

約数の個数: 32

約数和(自身を含む): 37438848

約数和(自身を除く): 16167543

約数列:

[1, 3, 5, 11, 15, 33, 55, 137, 165, 411, 685, 941, 1507, 2055, 2823, 4521, 4705, 7535, 10351, 14115, 22605, 31053, 51755, 128917, 155265, 386751, 644585, 1418087, 1933755, 4254261, 7090435, 21271305]

約数ペア:

[(1, 21271305), (3, 7090435), (5, 4254261), (11, 1933755), (15, 1418087), (33, 644585), (55, 386751), (137, 155265), (165, 128917), (411, 51755), (685, 31053), (941, 22605), (1507, 14115), (2055, 10351), (2823, 7535), (4521, 4705)]