21484280

素因数分解:

$2^3\times 5^1\times {\mathrm{151}}^1\times {\mathrm{3557}}^1$

素因数の和:3719

約数の個数: 32

約数和(自身を含む): 48673440

約数和(自身を除く): 27189160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 151, 302, 604, 755, 1208, 1510, 3020, 3557, 6040, 7114, 14228, 17785, 28456, 35570, 71140, 142280, 537107, 1074214, 2148428, 2685535, 4296856, 5371070, 10742140, 21484280]

約数ペア:

[(1, 21484280), (2, 10742140), (4, 5371070), (5, 4296856), (8, 2685535), (10, 2148428), (20, 1074214), (40, 537107), (151, 142280), (302, 71140), (604, 35570), (755, 28456), (1208, 17785), (1510, 14228), (3020, 7114), (3557, 6040)]