21978657

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{223}}^1\times {\mathrm{233}}^1$

素因数の和:509

約数の個数: 24

約数和(自身を含む): 32707584

約数和(自身を除く): 10728927

約数列:

[1, 3, 9, 47, 141, 223, 233, 423, 669, 699, 2007, 2097, 10481, 10951, 31443, 32853, 51959, 94329, 98559, 155877, 467631, 2442073, 7326219, 21978657]

約数ペア:

[(1, 21978657), (3, 7326219), (9, 2442073), (47, 467631), (141, 155877), (223, 98559), (233, 94329), (423, 51959), (669, 32853), (699, 31443), (2007, 10951), (2097, 10481)]