20745406940

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{401887}}^1$

素因数の和:402014

約数の個数: 48

約数和(自身を含む): 45574099200

約数和(自身を除く): 24828692260

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 89, 116, 145, 178, 290, 356, 445, 580, 890, 1780, 2581, 5162, 10324, 12905, 25810, 51620, 401887, 803774, 1607548, 2009435, 4018870, 8037740, 11654723, 23309446, 35767943, 46618892, 58273615, 71535886, 116547230, 143071772, 178839715, 233094460, 357679430, 715358860, 1037270347, 2074540694, 4149081388, 5186351735, 10372703470, 20745406940]

約数ペア:

[(1, 20745406940), (2, 10372703470), (4, 5186351735), (5, 4149081388), (10, 2074540694), (20, 1037270347), (29, 715358860), (58, 357679430), (89, 233094460), (116, 178839715), (145, 143071772), (178, 116547230), (290, 71535886), (356, 58273615), (445, 46618892), (580, 35767943), (890, 23309446), (1780, 11654723), (2581, 8037740), (5162, 4018870), (10324, 2009435), (12905, 1607548), (25810, 803774), (51620, 401887)]