21780423

素因数分解:

$3^2\times 7^1\times {\mathrm{227}}^1\times {\mathrm{1523}}^1$

素因数の和:1763

約数の個数: 24

約数和(自身を含む): 36137088

約数和(自身を除く): 14356665

約数列:

[1, 3, 7, 9, 21, 63, 227, 681, 1523, 1589, 2043, 4569, 4767, 10661, 13707, 14301, 31983, 95949, 345721, 1037163, 2420047, 3111489, 7260141, 21780423]

約数ペア:

[(1, 21780423), (3, 7260141), (7, 3111489), (9, 2420047), (21, 1037163), (63, 345721), (227, 95949), (681, 31983), (1523, 14301), (1589, 13707), (2043, 10661), (4569, 4767)]