21173211

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{283}}^1$

素因数の和:472

約数の個数: 32

約数和(自身を含む): 33534720

約数和(自身を除く): 12361509

約数列:

[1, 3, 9, 17, 27, 51, 153, 163, 283, 459, 489, 849, 1467, 2547, 2771, 4401, 4811, 7641, 8313, 14433, 24939, 43299, 46129, 74817, 129897, 138387, 415161, 784193, 1245483, 2352579, 7057737, 21173211]

約数ペア:

[(1, 21173211), (3, 7057737), (9, 2352579), (17, 1245483), (27, 784193), (51, 415161), (153, 138387), (163, 129897), (283, 74817), (459, 46129), (489, 43299), (849, 24939), (1467, 14433), (2547, 8313), (2771, 7641), (4401, 4811)]