20721393

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{9967}}^1$

素因数の和:9994

約数の個数: 32

約数和(自身を含む): 38277120

約数和(自身を除く): 17555727

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 63, 77, 99, 189, 231, 297, 693, 2079, 9967, 29901, 69769, 89703, 109637, 209307, 269109, 328911, 627921, 767459, 986733, 1883763, 2302377, 2960199, 6907131, 20721393]

約数ペア:

[(1, 20721393), (3, 6907131), (7, 2960199), (9, 2302377), (11, 1883763), (21, 986733), (27, 767459), (33, 627921), (63, 328911), (77, 269109), (99, 209307), (189, 109637), (231, 89703), (297, 69769), (693, 29901), (2079, 9967)]