21871809

素因数分解:

$3^3\times {\mathrm{17}}^2\times {\mathrm{2803}}^1$

素因数の和:2846

約数の個数: 24

約数和(自身を含む): 34433120

約数和(自身を除く): 12561311

約数列:

[1, 3, 9, 17, 27, 51, 153, 289, 459, 867, 2601, 2803, 7803, 8409, 25227, 47651, 75681, 142953, 428859, 810067, 1286577, 2430201, 7290603, 21871809]

約数ペア:

[(1, 21871809), (3, 7290603), (9, 2430201), (17, 1286577), (27, 810067), (51, 428859), (153, 142953), (289, 75681), (459, 47651), (867, 25227), (2601, 8409), (2803, 7803)]