81587940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{27751}}^1$

素因数の和:27777

約数の個数: 72

約数和(自身を含む): 265753152

約数和(自身を除く): 184165212

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 27751, 55502, 83253, 111004, 138755, 166506, 194257, 277510, 333012, 388514, 416265, 555020, 582771, 777028, 832530, 971285, 1165542, 1359799, 1665060, 1942570, 2331084, 2719598, 2913855, 3885140, 4079397, 5439196, 5827710, 6798995, 8158794, 11655420, 13597990, 16317588, 20396985, 27195980, 40793970, 81587940]

約数ペア:

[(1, 81587940), (2, 40793970), (3, 27195980), (4, 20396985), (5, 16317588), (6, 13597990), (7, 11655420), (10, 8158794), (12, 6798995), (14, 5827710), (15, 5439196), (20, 4079397), (21, 3885140), (28, 2913855), (30, 2719598), (35, 2331084), (42, 1942570), (49, 1665060), (60, 1359799), (70, 1165542), (84, 971285), (98, 832530), (105, 777028), (140, 582771), (147, 555020), (196, 416265), (210, 388514), (245, 333012), (294, 277510), (420, 194257), (490, 166506), (588, 138755), (735, 111004), (980, 83253), (1470, 55502), (2940, 27751)]