128781387

素因数分解:

$3^3\times 7^1\times {\mathrm{641}}^1\times {\mathrm{1063}}^1$

素因数の和:1720

約数の個数: 32

約数和(自身を含む): 218588160

約数和(自身を除く): 89806773

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 641, 1063, 1923, 3189, 4487, 5769, 7441, 9567, 13461, 17307, 22323, 28701, 40383, 66969, 121149, 200907, 681383, 2044149, 4769681, 6132447, 14309043, 18397341, 42927129, 128781387]

約数ペア:

[(1, 128781387), (3, 42927129), (7, 18397341), (9, 14309043), (21, 6132447), (27, 4769681), (63, 2044149), (189, 681383), (641, 200907), (1063, 121149), (1923, 66969), (3189, 40383), (4487, 28701), (5769, 22323), (7441, 17307), (9567, 13461)]