21221559

素因数分解:

$3^2\times {\mathrm{17}}^2\times {\mathrm{41}}^1\times {\mathrm{199}}^1$

素因数の和:280

約数の個数: 36

約数和(自身を含む): 33524400

約数和(自身を除く): 12302841

約数列:

[1, 3, 9, 17, 41, 51, 123, 153, 199, 289, 369, 597, 697, 867, 1791, 2091, 2601, 3383, 6273, 8159, 10149, 11849, 24477, 30447, 35547, 57511, 73431, 106641, 138703, 172533, 416109, 517599, 1248327, 2357951, 7073853, 21221559]

約数ペア:

[(1, 21221559), (3, 7073853), (9, 2357951), (17, 1248327), (41, 517599), (51, 416109), (123, 172533), (153, 138703), (199, 106641), (289, 73431), (369, 57511), (597, 35547), (697, 30447), (867, 24477), (1791, 11849), (2091, 10149), (2601, 8159), (3383, 6273)]