21365690

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{809}}^1$

素因数の和:974

約数の個数: 32

約数和(自身を含む): 40824000

約数和(自身を除く): 19458310

約数列:

[1, 2, 5, 10, 19, 38, 95, 139, 190, 278, 695, 809, 1390, 1618, 2641, 4045, 5282, 8090, 13205, 15371, 26410, 30742, 76855, 112451, 153710, 224902, 562255, 1124510, 2136569, 4273138, 10682845, 21365690]

約数ペア:

[(1, 21365690), (2, 10682845), (5, 4273138), (10, 2136569), (19, 1124510), (38, 562255), (95, 224902), (139, 153710), (190, 112451), (278, 76855), (695, 30742), (809, 26410), (1390, 15371), (1618, 13205), (2641, 8090), (4045, 5282)]