20801072

素因数分解:

$2^4\times {\mathrm{47}}^1\times {\mathrm{139}}^1\times {\mathrm{199}}^1$

素因数の和:393

約数の個数: 40

約数和(自身を含む): 41664000

約数和(自身を除く): 20862928

約数列:

[1, 2, 4, 8, 16, 47, 94, 139, 188, 199, 278, 376, 398, 556, 752, 796, 1112, 1592, 2224, 3184, 6533, 9353, 13066, 18706, 26132, 27661, 37412, 52264, 55322, 74824, 104528, 110644, 149648, 221288, 442576, 1300067, 2600134, 5200268, 10400536, 20801072]

約数ペア:

[(1, 20801072), (2, 10400536), (4, 5200268), (8, 2600134), (16, 1300067), (47, 442576), (94, 221288), (139, 149648), (188, 110644), (199, 104528), (278, 74824), (376, 55322), (398, 52264), (556, 37412), (752, 27661), (796, 26132), (1112, 18706), (1592, 13066), (2224, 9353), (3184, 6533)]