20910565

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{197}}^1$

素因数の和:309

約数の個数: 32

約数和(自身を含む): 28740096

約数和(自身を除く): 7829531

約数列:

[1, 5, 13, 23, 65, 71, 115, 197, 299, 355, 923, 985, 1495, 1633, 2561, 4531, 4615, 8165, 12805, 13987, 21229, 22655, 58903, 69935, 106145, 181831, 294515, 321701, 909155, 1608505, 4182113, 20910565]

約数ペア:

[(1, 20910565), (5, 4182113), (13, 1608505), (23, 909155), (65, 321701), (71, 294515), (115, 181831), (197, 106145), (299, 69935), (355, 58903), (923, 22655), (985, 21229), (1495, 13987), (1633, 12805), (2561, 8165), (4531, 4615)]