20398105

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{353}}^1$

素因数の和:505

約数の個数: 32

約数和(自身を含む): 30449664

約数和(自身を除く): 10051559

約数列:

[1, 5, 7, 13, 35, 65, 91, 127, 353, 455, 635, 889, 1651, 1765, 2471, 4445, 4589, 8255, 11557, 12355, 22945, 32123, 44831, 57785, 160615, 224155, 313817, 582803, 1569085, 2914015, 4079621, 20398105]

約数ペア:

[(1, 20398105), (5, 4079621), (7, 2914015), (13, 1569085), (35, 582803), (65, 313817), (91, 224155), (127, 160615), (353, 57785), (455, 44831), (635, 32123), (889, 22945), (1651, 12355), (1765, 11557), (2471, 8255), (4445, 4589)]