21738213

素因数分解:

$3^4\times 7^2\times {\mathrm{5477}}^1$

素因数の和:5503

約数の個数: 30

約数和(自身を含む): 37781766

約数和(自身を除く): 16043553

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 441, 567, 1323, 3969, 5477, 16431, 38339, 49293, 115017, 147879, 268373, 345051, 443637, 805119, 1035153, 2415357, 3105459, 7246071, 21738213]

約数ペア:

[(1, 21738213), (3, 7246071), (7, 3105459), (9, 2415357), (21, 1035153), (27, 805119), (49, 443637), (63, 345051), (81, 268373), (147, 147879), (189, 115017), (441, 49293), (567, 38339), (1323, 16431), (3969, 5477)]