78720640

素因数分解:

$2^7\times 5^1\times {\mathrm{123001}}^1$

素因数の和:123020

約数の個数: 32

約数和(自身を含む): 188193060

約数和(自身を除く): 109472420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 123001, 246002, 492004, 615005, 984008, 1230010, 1968016, 2460020, 3936032, 4920040, 7872064, 9840080, 15744128, 19680160, 39360320, 78720640]

約数ペア:

[(1, 78720640), (2, 39360320), (4, 19680160), (5, 15744128), (8, 9840080), (10, 7872064), (16, 4920040), (20, 3936032), (32, 2460020), (40, 1968016), (64, 1230010), (80, 984008), (128, 615005), (160, 492004), (320, 246002), (640, 123001)]