21080990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{4937}}^1$

素因数の和:5012

約数の個数: 32

約数和(自身を含む): 44086464

約数和(自身を除く): 23005474

約数列:

[1, 2, 5, 7, 10, 14, 35, 61, 70, 122, 305, 427, 610, 854, 2135, 4270, 4937, 9874, 24685, 34559, 49370, 69118, 172795, 301157, 345590, 602314, 1505785, 2108099, 3011570, 4216198, 10540495, 21080990]

約数ペア:

[(1, 21080990), (2, 10540495), (5, 4216198), (7, 3011570), (10, 2108099), (14, 1505785), (35, 602314), (61, 345590), (70, 301157), (122, 172795), (305, 69118), (427, 49370), (610, 34559), (854, 24685), (2135, 9874), (4270, 4937)]