80520640

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8117}}^1$

素因数の和:8165

約数の個数: 56

約数和(自身を含む): 197949312

約数和(自身を除く): 117428672

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 155, 160, 248, 310, 320, 496, 620, 992, 1240, 1984, 2480, 4960, 8117, 9920, 16234, 32468, 40585, 64936, 81170, 129872, 162340, 251627, 259744, 324680, 503254, 519488, 649360, 1006508, 1258135, 1298720, 2013016, 2516270, 2597440, 4026032, 5032540, 8052064, 10065080, 16104128, 20130160, 40260320, 80520640]

約数ペア:

[(1, 80520640), (2, 40260320), (4, 20130160), (5, 16104128), (8, 10065080), (10, 8052064), (16, 5032540), (20, 4026032), (31, 2597440), (32, 2516270), (40, 2013016), (62, 1298720), (64, 1258135), (80, 1006508), (124, 649360), (155, 519488), (160, 503254), (248, 324680), (310, 259744), (320, 251627), (496, 162340), (620, 129872), (992, 81170), (1240, 64936), (1984, 40585), (2480, 32468), (4960, 16234), (8117, 9920)]