9887900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:215

約数の個数: 72

約数和(自身を含む): 23904720

約数和(自身を除く): 14016820

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 89, 100, 101, 110, 178, 202, 220, 275, 356, 404, 445, 505, 550, 890, 979, 1010, 1100, 1111, 1780, 1958, 2020, 2222, 2225, 2525, 3916, 4444, 4450, 4895, 5050, 5555, 8900, 8989, 9790, 10100, 11110, 17978, 19580, 22220, 24475, 27775, 35956, 44945, 48950, 55550, 89890, 97900, 98879, 111100, 179780, 197758, 224725, 395516, 449450, 494395, 898900, 988790, 1977580, 2471975, 4943950, 9887900]

約数ペア:

[(1, 9887900), (2, 4943950), (4, 2471975), (5, 1977580), (10, 988790), (11, 898900), (20, 494395), (22, 449450), (25, 395516), (44, 224725), (50, 197758), (55, 179780), (89, 111100), (100, 98879), (101, 97900), (110, 89890), (178, 55550), (202, 48950), (220, 44945), (275, 35956), (356, 27775), (404, 24475), (445, 22220), (505, 19580), (550, 17978), (890, 11110), (979, 10100), (1010, 9790), (1100, 8989), (1111, 8900), (1780, 5555), (1958, 5050), (2020, 4895), (2222, 4450), (2225, 4444), (2525, 3916)]