40320640

素因数分解:

$2^7\times 5^1\times {\mathrm{251}}^2$

素因数の和:521

約数の個数: 48

約数和(自身を含む): 96777090

約数和(自身を除く): 56456450

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 251, 320, 502, 640, 1004, 1255, 2008, 2510, 4016, 5020, 8032, 10040, 16064, 20080, 32128, 40160, 63001, 80320, 126002, 160640, 252004, 315005, 504008, 630010, 1008016, 1260020, 2016032, 2520040, 4032064, 5040080, 8064128, 10080160, 20160320, 40320640]

約数ペア:

[(1, 40320640), (2, 20160320), (4, 10080160), (5, 8064128), (8, 5040080), (10, 4032064), (16, 2520040), (20, 2016032), (32, 1260020), (40, 1008016), (64, 630010), (80, 504008), (128, 315005), (160, 252004), (251, 160640), (320, 126002), (502, 80320), (640, 63001), (1004, 40160), (1255, 32128), (2008, 20080), (2510, 16064), (4016, 10040), (5020, 8032)]