20965919620

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{353}}^1\times {\mathrm{14923}}^1$

素因数の和:15484

約数の個数: 48

約数和(自身を含む): 44378006400

約数和(自身を除く): 23412086780

約数列:

[1, 2, 4, 5, 10, 20, 199, 353, 398, 706, 796, 995, 1412, 1765, 1990, 3530, 3980, 7060, 14923, 29846, 59692, 70247, 74615, 140494, 149230, 280988, 298460, 351235, 702470, 1404940, 2969677, 5267819, 5939354, 10535638, 11878708, 14848385, 21071276, 26339095, 29696770, 52678190, 59393540, 105356380, 1048295981, 2096591962, 4193183924, 5241479905, 10482959810, 20965919620]

約数ペア:

[(1, 20965919620), (2, 10482959810), (4, 5241479905), (5, 4193183924), (10, 2096591962), (20, 1048295981), (199, 105356380), (353, 59393540), (398, 52678190), (706, 29696770), (796, 26339095), (995, 21071276), (1412, 14848385), (1765, 11878708), (1990, 10535638), (3530, 5939354), (3980, 5267819), (7060, 2969677), (14923, 1404940), (29846, 702470), (59692, 351235), (70247, 298460), (74615, 280988), (140494, 149230)]