81879680

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4127}}^1$

素因数の和:4177

約数の個数: 64

約数和(自身を含む): 202106880

約数和(自身を除く): 120227200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 992, 1240, 1984, 2480, 3968, 4127, 4960, 8254, 9920, 16508, 19840, 20635, 33016, 41270, 66032, 82540, 127937, 132064, 165080, 255874, 264128, 330160, 511748, 528256, 639685, 660320, 1023496, 1279370, 1320640, 2046992, 2558740, 2641280, 4093984, 5117480, 8187968, 10234960, 16375936, 20469920, 40939840, 81879680]

約数ペア:

[(1, 81879680), (2, 40939840), (4, 20469920), (5, 16375936), (8, 10234960), (10, 8187968), (16, 5117480), (20, 4093984), (31, 2641280), (32, 2558740), (40, 2046992), (62, 1320640), (64, 1279370), (80, 1023496), (124, 660320), (128, 639685), (155, 528256), (160, 511748), (248, 330160), (310, 264128), (320, 255874), (496, 165080), (620, 132064), (640, 127937), (992, 82540), (1240, 66032), (1984, 41270), (2480, 33016), (3968, 20635), (4127, 19840), (4960, 16508), (8254, 9920)]