21691473

素因数分解:

$3^1\times {\mathrm{17}}^2\times {\mathrm{127}}^1\times {\mathrm{197}}^1$

素因数の和:361

約数の個数: 24

約数和(自身を含む): 31122432

約数和(自身を除く): 9430959

約数列:

[1, 3, 17, 51, 127, 197, 289, 381, 591, 867, 2159, 3349, 6477, 10047, 25019, 36703, 56933, 75057, 110109, 170799, 425323, 1275969, 7230491, 21691473]

約数ペア:

[(1, 21691473), (3, 7230491), (17, 1275969), (51, 425323), (127, 170799), (197, 110109), (289, 75057), (381, 56933), (591, 36703), (867, 25019), (2159, 10047), (3349, 6477)]