20581180

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1321}}^1$

素因数の和:1390

約数の個数: 48

約数和(自身を含む): 46640160

約数和(自身を除く): 26058980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 41, 76, 82, 95, 164, 190, 205, 380, 410, 779, 820, 1321, 1558, 2642, 3116, 3895, 5284, 6605, 7790, 13210, 15580, 25099, 26420, 50198, 54161, 100396, 108322, 125495, 216644, 250990, 270805, 501980, 541610, 1029059, 1083220, 2058118, 4116236, 5145295, 10290590, 20581180]

約数ペア:

[(1, 20581180), (2, 10290590), (4, 5145295), (5, 4116236), (10, 2058118), (19, 1083220), (20, 1029059), (38, 541610), (41, 501980), (76, 270805), (82, 250990), (95, 216644), (164, 125495), (190, 108322), (205, 100396), (380, 54161), (410, 50198), (779, 26420), (820, 25099), (1321, 15580), (1558, 13210), (2642, 7790), (3116, 6605), (3895, 5284)]