21219417

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{331}}^1\times {\mathrm{419}}^1$

素因数の和:773

約数の個数: 24

約数和(自身を含む): 32628960

約数和(自身を除く): 11409543

約数列:

[1, 3, 9, 17, 51, 153, 331, 419, 993, 1257, 2979, 3771, 5627, 7123, 16881, 21369, 50643, 64107, 138689, 416067, 1248201, 2357713, 7073139, 21219417]

約数ペア:

[(1, 21219417), (3, 7073139), (9, 2357713), (17, 1248201), (51, 416067), (153, 138689), (331, 64107), (419, 50643), (993, 21369), (1257, 16881), (2979, 7123), (3771, 5627)]