20160320

素因数分解:

$2^6\times 5^1\times {\mathrm{251}}^2$

素因数の和:519

約数の個数: 42

約数和(自身を含む): 48198786

約数和(自身を除く): 28038466

約数列:

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

約数ペア:

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