21247161

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{439}}^1$

素因数の和:545

約数の個数: 32

約数和(自身を含む): 32820480

約数和(自身を除く): 11573319

約数列:

[1, 3, 13, 17, 39, 51, 73, 219, 221, 439, 663, 949, 1241, 1317, 2847, 3723, 5707, 7463, 16133, 17121, 22389, 32047, 48399, 96141, 97019, 291057, 416611, 544799, 1249833, 1634397, 7082387, 21247161]

約数ペア:

[(1, 21247161), (3, 7082387), (13, 1634397), (17, 1249833), (39, 544799), (51, 416611), (73, 291057), (219, 97019), (221, 96141), (439, 48399), (663, 32047), (949, 22389), (1241, 17121), (1317, 16133), (2847, 7463), (3723, 5707)]