21801400

素因数分解:

$2^3\times 5^2\times {\mathrm{61}}^1\times {\mathrm{1787}}^1$

素因数の和:1864

約数の個数: 48

約数和(自身を含む): 51548040

約数和(自身を除く): 29746640

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 61, 100, 122, 200, 244, 305, 488, 610, 1220, 1525, 1787, 2440, 3050, 3574, 6100, 7148, 8935, 12200, 14296, 17870, 35740, 44675, 71480, 89350, 109007, 178700, 218014, 357400, 436028, 545035, 872056, 1090070, 2180140, 2725175, 4360280, 5450350, 10900700, 21801400]

約数ペア:

[(1, 21801400), (2, 10900700), (4, 5450350), (5, 4360280), (8, 2725175), (10, 2180140), (20, 1090070), (25, 872056), (40, 545035), (50, 436028), (61, 357400), (100, 218014), (122, 178700), (200, 109007), (244, 89350), (305, 71480), (488, 44675), (610, 35740), (1220, 17870), (1525, 14296), (1787, 12200), (2440, 8935), (3050, 7148), (3574, 6100)]