21139600

素因数分解:

$2^4\times 5^2\times {\mathrm{41}}^1\times {\mathrm{1289}}^1$

素因数の和:1348

約数の個数: 60

約数和(自身を含む): 52066980

約数和(自身を除く): 30927380

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 41, 50, 80, 82, 100, 164, 200, 205, 328, 400, 410, 656, 820, 1025, 1289, 1640, 2050, 2578, 3280, 4100, 5156, 6445, 8200, 10312, 12890, 16400, 20624, 25780, 32225, 51560, 52849, 64450, 103120, 105698, 128900, 211396, 257800, 264245, 422792, 515600, 528490, 845584, 1056980, 1321225, 2113960, 2642450, 4227920, 5284900, 10569800, 21139600]

約数ペア:

[(1, 21139600), (2, 10569800), (4, 5284900), (5, 4227920), (8, 2642450), (10, 2113960), (16, 1321225), (20, 1056980), (25, 845584), (40, 528490), (41, 515600), (50, 422792), (80, 264245), (82, 257800), (100, 211396), (164, 128900), (200, 105698), (205, 103120), (328, 64450), (400, 52849), (410, 51560), (656, 32225), (820, 25780), (1025, 20624), (1289, 16400), (1640, 12890), (2050, 10312), (2578, 8200), (3280, 6445), (4100, 5156)]