21987900

素因数分解:

$2^2\times 3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{2221}}^1$

素因数の和:2252

約数の個数: 108

約数和(自身を含む): 75219144

約数和(自身を除く): 53231244

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 25, 30, 33, 36, 44, 45, 50, 55, 60, 66, 75, 90, 99, 100, 110, 132, 150, 165, 180, 198, 220, 225, 275, 300, 330, 396, 450, 495, 550, 660, 825, 900, 990, 1100, 1650, 1980, 2221, 2475, 3300, 4442, 4950, 6663, 8884, 9900, 11105, 13326, 19989, 22210, 24431, 26652, 33315, 39978, 44420, 48862, 55525, 66630, 73293, 79956, 97724, 99945, 111050, 122155, 133260, 146586, 166575, 199890, 219879, 222100, 244310, 293172, 333150, 366465, 399780, 439758, 488620, 499725, 610775, 666300, 732930, 879516, 999450, 1099395, 1221550, 1465860, 1832325, 1998900, 2198790, 2443100, 3664650, 4397580, 5496975, 7329300, 10993950, 21987900]

約数ペア:

[(1, 21987900), (2, 10993950), (3, 7329300), (4, 5496975), (5, 4397580), (6, 3664650), (9, 2443100), (10, 2198790), (11, 1998900), (12, 1832325), (15, 1465860), (18, 1221550), (20, 1099395), (22, 999450), (25, 879516), (30, 732930), (33, 666300), (36, 610775), (44, 499725), (45, 488620), (50, 439758), (55, 399780), (60, 366465), (66, 333150), (75, 293172), (90, 244310), (99, 222100), (100, 219879), (110, 199890), (132, 166575), (150, 146586), (165, 133260), (180, 122155), (198, 111050), (220, 99945), (225, 97724), (275, 79956), (300, 73293), (330, 66630), (396, 55525), (450, 48862), (495, 44420), (550, 39978), (660, 33315), (825, 26652), (900, 24431), (990, 22210), (1100, 19989), (1650, 13326), (1980, 11105), (2221, 9900), (2475, 8884), (3300, 6663), (4442, 4950)]