21620500

素因数分解:

$2^2\times 5^3\times {\mathrm{11}}^1\times {\mathrm{3931}}^1$

素因数の和:3961

約数の個数: 48

約数和(自身を含む): 51524928

約数和(自身を除く): 29904428

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 125, 220, 250, 275, 500, 550, 1100, 1375, 2750, 3931, 5500, 7862, 15724, 19655, 39310, 43241, 78620, 86482, 98275, 172964, 196550, 216205, 393100, 432410, 491375, 864820, 982750, 1081025, 1965500, 2162050, 4324100, 5405125, 10810250, 21620500]

約数ペア:

[(1, 21620500), (2, 10810250), (4, 5405125), (5, 4324100), (10, 2162050), (11, 1965500), (20, 1081025), (22, 982750), (25, 864820), (44, 491375), (50, 432410), (55, 393100), (100, 216205), (110, 196550), (125, 172964), (220, 98275), (250, 86482), (275, 78620), (500, 43241), (550, 39310), (1100, 19655), (1375, 15724), (2750, 7862), (3931, 5500)]