20938780

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{5261}}^1$

素因数の和:5469

約数の個数: 24

約数和(自身を含む): 44200800

約数和(自身を除く): 23262020

約数列:

[1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980, 5261, 10522, 21044, 26305, 52610, 105220, 1046939, 2093878, 4187756, 5234695, 10469390, 20938780]

約数ペア:

[(1, 20938780), (2, 10469390), (4, 5234695), (5, 4187756), (10, 2093878), (20, 1046939), (199, 105220), (398, 52610), (796, 26305), (995, 21044), (1990, 10522), (3980, 5261)]