1977580

素因数分解:

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

素因数の和:210

約数の個数: 48

約数和(自身を含む): 4626720

約数和(自身を除く): 2649140

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 101, 110, 178, 202, 220, 356, 404, 445, 505, 890, 979, 1010, 1111, 1780, 1958, 2020, 2222, 3916, 4444, 4895, 5555, 8989, 9790, 11110, 17978, 19580, 22220, 35956, 44945, 89890, 98879, 179780, 197758, 395516, 494395, 988790, 1977580]

約数ペア:

[(1, 1977580), (2, 988790), (4, 494395), (5, 395516), (10, 197758), (11, 179780), (20, 98879), (22, 89890), (44, 44945), (55, 35956), (89, 22220), (101, 19580), (110, 17978), (178, 11110), (202, 9790), (220, 8989), (356, 5555), (404, 4895), (445, 4444), (505, 3916), (890, 2222), (979, 2020), (1010, 1958), (1111, 1780)]