19688656

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{919}}^1$

素因数の和:1043

約数の個数: 40

約数和(自身を含む): 41525120

約数和(自身を除く): 21836464

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 103, 104, 206, 208, 412, 824, 919, 1339, 1648, 1838, 2678, 3676, 5356, 7352, 10712, 11947, 14704, 21424, 23894, 47788, 94657, 95576, 189314, 191152, 378628, 757256, 1230541, 1514512, 2461082, 4922164, 9844328, 19688656]

約数ペア:

[(1, 19688656), (2, 9844328), (4, 4922164), (8, 2461082), (13, 1514512), (16, 1230541), (26, 757256), (52, 378628), (103, 191152), (104, 189314), (206, 95576), (208, 94657), (412, 47788), (824, 23894), (919, 21424), (1339, 14704), (1648, 11947), (1838, 10712), (2678, 7352), (3676, 5356)]