21157020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{117539}}^1$

素因数の和:117554

約数の個数: 36

約数和(自身を含む): 64176840

約数和(自身を除く): 43019820

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 117539, 235078, 352617, 470156, 587695, 705234, 1057851, 1175390, 1410468, 1763085, 2115702, 2350780, 3526170, 4231404, 5289255, 7052340, 10578510, 21157020]

約数ペア:

[(1, 21157020), (2, 10578510), (3, 7052340), (4, 5289255), (5, 4231404), (6, 3526170), (9, 2350780), (10, 2115702), (12, 1763085), (15, 1410468), (18, 1175390), (20, 1057851), (30, 705234), (36, 587695), (45, 470156), (60, 352617), (90, 235078), (180, 117539)]