21118131

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{331}}^1$

素因数の和:496

約数の個数: 32

約数和(自身を含む): 33465600

約数和(自身を除く): 12347469

約数列:

[1, 3, 9, 17, 27, 51, 139, 153, 331, 417, 459, 993, 1251, 2363, 2979, 3753, 5627, 7089, 8937, 16881, 21267, 46009, 50643, 63801, 138027, 151929, 414081, 782153, 1242243, 2346459, 7039377, 21118131]

約数ペア:

[(1, 21118131), (3, 7039377), (9, 2346459), (17, 1242243), (27, 782153), (51, 414081), (139, 151929), (153, 138027), (331, 63801), (417, 50643), (459, 46009), (993, 21267), (1251, 16881), (2363, 8937), (2979, 7089), (3753, 5627)]