19687759

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{997}}^1$

素因数の和:1055

約数の個数: 24

約数和(自身を含む): 25484928

約数和(自身を除く): 5797169

約数列:

[1, 7, 13, 31, 49, 91, 217, 403, 637, 997, 1519, 2821, 6979, 12961, 19747, 30907, 48853, 90727, 216349, 401791, 635089, 1514443, 2812537, 19687759]

約数ペア:

[(1, 19687759), (7, 2812537), (13, 1514443), (31, 635089), (49, 401791), (91, 216349), (217, 90727), (403, 48853), (637, 30907), (997, 19747), (1519, 12961), (2821, 6979)]