20781383

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1$

素因数の和:207

約数の個数: 32

約数和(自身を含む): 26557440

約数和(自身を除く): 5776057

約数列:

[1, 7, 19, 37, 41, 103, 133, 259, 287, 703, 721, 779, 1517, 1957, 3811, 4223, 4921, 5453, 10619, 13699, 26677, 28823, 29561, 72409, 80237, 156251, 201761, 506863, 561659, 1093757, 2968769, 20781383]

約数ペア:

[(1, 20781383), (7, 2968769), (19, 1093757), (37, 561659), (41, 506863), (103, 201761), (133, 156251), (259, 80237), (287, 72409), (703, 29561), (721, 28823), (779, 26677), (1517, 13699), (1957, 10619), (3811, 5453), (4223, 4921)]