28010020

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{20903}}^1$

素因数の和:20979

約数の個数: 24

約数和(自身を含む): 59701824

約数和(自身を除く): 31691804

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1340, 20903, 41806, 83612, 104515, 209030, 418060, 1400501, 2801002, 5602004, 7002505, 14005010, 28010020]

約数ペア:

[(1, 28010020), (2, 14005010), (4, 7002505), (5, 5602004), (10, 2801002), (20, 1400501), (67, 418060), (134, 209030), (268, 104515), (335, 83612), (670, 41806), (1340, 20903)]