25528760

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:272

約数の個数: 64

約数和(自身を含む): 59486400

約数和(自身を除く): 33957640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 89, 101, 142, 178, 202, 284, 355, 356, 404, 445, 505, 568, 710, 712, 808, 890, 1010, 1420, 1780, 2020, 2840, 3560, 4040, 6319, 7171, 8989, 12638, 14342, 17978, 25276, 28684, 31595, 35855, 35956, 44945, 50552, 57368, 63190, 71710, 71912, 89890, 126380, 143420, 179780, 252760, 286840, 359560, 638219, 1276438, 2552876, 3191095, 5105752, 6382190, 12764380, 25528760]

約数ペア:

[(1, 25528760), (2, 12764380), (4, 6382190), (5, 5105752), (8, 3191095), (10, 2552876), (20, 1276438), (40, 638219), (71, 359560), (89, 286840), (101, 252760), (142, 179780), (178, 143420), (202, 126380), (284, 89890), (355, 71912), (356, 71710), (404, 63190), (445, 57368), (505, 50552), (568, 44945), (710, 35956), (712, 35855), (808, 31595), (890, 28684), (1010, 25276), (1420, 17978), (1780, 14342), (2020, 12638), (2840, 8989), (3560, 7171), (4040, 6319)]