81221420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{1237}}^1$

素因数の和:1327

約数の個数: 72

約数和(自身を含む): 201536496

約数和(自身を除く): 120315076

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 67, 70, 98, 134, 140, 196, 245, 268, 335, 469, 490, 670, 938, 980, 1237, 1340, 1876, 2345, 2474, 3283, 4690, 4948, 6185, 6566, 8659, 9380, 12370, 13132, 16415, 17318, 24740, 32830, 34636, 43295, 60613, 65660, 82879, 86590, 121226, 165758, 173180, 242452, 303065, 331516, 414395, 580153, 606130, 828790, 1160306, 1212260, 1657580, 2320612, 2900765, 4061071, 5801530, 8122142, 11603060, 16244284, 20305355, 40610710, 81221420]

約数ペア:

[(1, 81221420), (2, 40610710), (4, 20305355), (5, 16244284), (7, 11603060), (10, 8122142), (14, 5801530), (20, 4061071), (28, 2900765), (35, 2320612), (49, 1657580), (67, 1212260), (70, 1160306), (98, 828790), (134, 606130), (140, 580153), (196, 414395), (245, 331516), (268, 303065), (335, 242452), (469, 173180), (490, 165758), (670, 121226), (938, 86590), (980, 82879), (1237, 65660), (1340, 60613), (1876, 43295), (2345, 34636), (2474, 32830), (3283, 24740), (4690, 17318), (4948, 16415), (6185, 13132), (6566, 12370), (8659, 9380)]