21054789

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{6553}}^1$

素因数の和:6586

約数の個数: 32

約数和(自身を含む): 37751040

約数和(自身を除く): 16696251

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 119, 153, 189, 357, 459, 1071, 3213, 6553, 19659, 45871, 58977, 111401, 137613, 176931, 334203, 412839, 779807, 1002609, 1238517, 2339421, 3007827, 7018263, 21054789]

約数ペア:

[(1, 21054789), (3, 7018263), (7, 3007827), (9, 2339421), (17, 1238517), (21, 1002609), (27, 779807), (51, 412839), (63, 334203), (119, 176931), (153, 137613), (189, 111401), (357, 58977), (459, 45871), (1071, 19659), (3213, 6553)]