20395815

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1741}}^1$

素因数の和:1831

約数の個数: 32

約数和(自身を含む): 36122112

約数和(自身を除く): 15726297

約数列:

[1, 3, 5, 11, 15, 33, 55, 71, 165, 213, 355, 781, 1065, 1741, 2343, 3905, 5223, 8705, 11715, 19151, 26115, 57453, 95755, 123611, 287265, 370833, 618055, 1359721, 1854165, 4079163, 6798605, 20395815]

約数ペア:

[(1, 20395815), (3, 6798605), (5, 4079163), (11, 1854165), (15, 1359721), (33, 618055), (55, 370833), (71, 287265), (165, 123611), (213, 95755), (355, 57453), (781, 26115), (1065, 19151), (1741, 11715), (2343, 8705), (3905, 5223)]