19980639

素因数分解:

$3^2\times 7^1\times {\mathrm{239}}^1\times {\mathrm{1327}}^1$

素因数の和:1579

約数の個数: 24

約数和(自身を含む): 33146880

約数和(自身を除く): 13166241

約数列:

[1, 3, 7, 9, 21, 63, 239, 717, 1327, 1673, 2151, 3981, 5019, 9289, 11943, 15057, 27867, 83601, 317153, 951459, 2220071, 2854377, 6660213, 19980639]

約数ペア:

[(1, 19980639), (3, 6660213), (7, 2854377), (9, 2220071), (21, 951459), (63, 317153), (239, 83601), (717, 27867), (1327, 15057), (1673, 11943), (2151, 9289), (3981, 5019)]