21049665

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{2203}}^1$

素因数の和:2238

約数の個数: 48

約数和(自身を含む): 42211008

約数和(自身を除く): 21161343

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 49, 65, 91, 105, 147, 195, 245, 273, 455, 637, 735, 1365, 1911, 2203, 3185, 6609, 9555, 11015, 15421, 28639, 33045, 46263, 77105, 85917, 107947, 143195, 200473, 231315, 323841, 429585, 539735, 601419, 1002365, 1403311, 1619205, 3007095, 4209933, 7016555, 21049665]

約数ペア:

[(1, 21049665), (3, 7016555), (5, 4209933), (7, 3007095), (13, 1619205), (15, 1403311), (21, 1002365), (35, 601419), (39, 539735), (49, 429585), (65, 323841), (91, 231315), (105, 200473), (147, 143195), (195, 107947), (245, 85917), (273, 77105), (455, 46263), (637, 33045), (735, 28639), (1365, 15421), (1911, 11015), (2203, 9555), (3185, 6609)]