21220029

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{557}}^1$

素因数の和:666

約数の個数: 32

約数和(自身を含む): 33747840

約数和(自身を除く): 12527811

約数列:

[1, 3, 9, 17, 27, 51, 83, 153, 249, 459, 557, 747, 1411, 1671, 2241, 4233, 5013, 9469, 12699, 15039, 28407, 38097, 46231, 85221, 138693, 255663, 416079, 785927, 1248237, 2357781, 7073343, 21220029]

約数ペア:

[(1, 21220029), (3, 7073343), (9, 2357781), (17, 1248237), (27, 785927), (51, 416079), (83, 255663), (153, 138693), (249, 85221), (459, 46231), (557, 38097), (747, 28407), (1411, 15039), (1671, 12699), (2241, 9469), (4233, 5013)]