21278409

素因数分解:

$3^1\times {\mathrm{59}}^1\times {\mathrm{239}}^1\times {\mathrm{503}}^1$

素因数の和:804

約数の個数: 16

約数和(自身を含む): 29030400

約数和(自身を除く): 7751991

約数列:

[1, 3, 59, 177, 239, 503, 717, 1509, 14101, 29677, 42303, 89031, 120217, 360651, 7092803, 21278409]

約数ペア:

[(1, 21278409), (3, 7092803), (59, 360651), (177, 120217), (239, 89031), (503, 42303), (717, 29677), (1509, 14101)]