20147840

素因数分解:

$2^7\times 5^1\times {\mathrm{31481}}^1$

素因数の和:31500

約数の個数: 32

約数和(自身を含む): 48167460

約数和(自身を除く): 28019620

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 31481, 62962, 125924, 157405, 251848, 314810, 503696, 629620, 1007392, 1259240, 2014784, 2518480, 4029568, 5036960, 10073920, 20147840]

約数ペア:

[(1, 20147840), (2, 10073920), (4, 5036960), (5, 4029568), (8, 2518480), (10, 2014784), (16, 1259240), (20, 1007392), (32, 629620), (40, 503696), (64, 314810), (80, 251848), (128, 157405), (160, 125924), (320, 62962), (640, 31481)]