21406485

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{661}}^1$

素因数の和:813

約数の個数: 32

約数和(自身を含む): 36605952

約数和(自身を除く): 15199467

約数列:

[1, 3, 5, 15, 17, 51, 85, 127, 255, 381, 635, 661, 1905, 1983, 2159, 3305, 6477, 9915, 10795, 11237, 32385, 33711, 56185, 83947, 168555, 251841, 419735, 1259205, 1427099, 4281297, 7135495, 21406485]

約数ペア:

[(1, 21406485), (3, 7135495), (5, 4281297), (15, 1427099), (17, 1259205), (51, 419735), (85, 251841), (127, 168555), (255, 83947), (381, 56185), (635, 33711), (661, 32385), (1905, 11237), (1983, 10795), (2159, 9915), (3305, 6477)]