21578020

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{16103}}^1$

素因数の和:16179

約数の個数: 24

約数和(自身を含む): 45993024

約数和(自身を除く): 24415004

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1340, 16103, 32206, 64412, 80515, 161030, 322060, 1078901, 2157802, 4315604, 5394505, 10789010, 21578020]

約数ペア:

[(1, 21578020), (2, 10789010), (4, 5394505), (5, 4315604), (10, 2157802), (20, 1078901), (67, 322060), (134, 161030), (268, 80515), (335, 64412), (670, 32206), (1340, 16103)]