21020920

素因数分解:

$2^3\times 5^1\times {\mathrm{149}}^1\times {\mathrm{3527}}^1$

素因数の和:3687

約数の個数: 32

約数和(自身を含む): 47628000

約数和(自身を除く): 26607080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 149, 298, 596, 745, 1192, 1490, 2980, 3527, 5960, 7054, 14108, 17635, 28216, 35270, 70540, 141080, 525523, 1051046, 2102092, 2627615, 4204184, 5255230, 10510460, 21020920]

約数ペア:

[(1, 21020920), (2, 10510460), (4, 5255230), (5, 4204184), (8, 2627615), (10, 2102092), (20, 1051046), (40, 525523), (149, 141080), (298, 70540), (596, 35270), (745, 28216), (1192, 17635), (1490, 14108), (2980, 7054), (3527, 5960)]