81246815

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{661}}^1$

素因数の和:771

約数の個数: 32

約数和(自身を含む): 110326272

約数和(自身を除く): 29079457

約数列:

[1, 5, 13, 31, 61, 65, 155, 305, 403, 661, 793, 1891, 2015, 3305, 3965, 8593, 9455, 20491, 24583, 40321, 42965, 102455, 122915, 201605, 266383, 524173, 1249951, 1331915, 2620865, 6249755, 16249363, 81246815]

約数ペア:

[(1, 81246815), (5, 16249363), (13, 6249755), (31, 2620865), (61, 1331915), (65, 1249951), (155, 524173), (305, 266383), (403, 201605), (661, 122915), (793, 102455), (1891, 42965), (2015, 40321), (3305, 24583), (3965, 20491), (8593, 9455)]