20517805

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{389}}^1$

素因数の和:549

約数の個数: 32

約数和(自身を含む): 31000320

約数和(自身を除く): 10482515

約数列:

[1, 5, 7, 11, 35, 55, 77, 137, 385, 389, 685, 959, 1507, 1945, 2723, 4279, 4795, 7535, 10549, 13615, 21395, 29953, 52745, 53293, 149765, 266465, 373051, 586223, 1865255, 2931115, 4103561, 20517805]

約数ペア:

[(1, 20517805), (5, 4103561), (7, 2931115), (11, 1865255), (35, 586223), (55, 373051), (77, 266465), (137, 149765), (385, 53293), (389, 52745), (685, 29953), (959, 21395), (1507, 13615), (1945, 10549), (2723, 7535), (4279, 4795)]