28081636

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:276

約数の個数: 48

約数和(自身を含む): 55520640

約数和(自身を除く): 27439004

約数列:

[1, 2, 4, 11, 22, 44, 71, 89, 101, 142, 178, 202, 284, 356, 404, 781, 979, 1111, 1562, 1958, 2222, 3124, 3916, 4444, 6319, 7171, 8989, 12638, 14342, 17978, 25276, 28684, 35956, 69509, 78881, 98879, 139018, 157762, 197758, 278036, 315524, 395516, 638219, 1276438, 2552876, 7020409, 14040818, 28081636]

約数ペア:

[(1, 28081636), (2, 14040818), (4, 7020409), (11, 2552876), (22, 1276438), (44, 638219), (71, 395516), (89, 315524), (101, 278036), (142, 197758), (178, 157762), (202, 139018), (284, 98879), (356, 78881), (404, 69509), (781, 35956), (979, 28684), (1111, 25276), (1562, 17978), (1958, 14342), (2222, 12638), (3124, 8989), (3916, 7171), (4444, 6319)]