21578049

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{887}}^1$

素因数の和:966

約数の個数: 32

約数和(自身を含む): 34525440

約数和(自身を除く): 12947391

約数列:

[1, 3, 9, 17, 27, 51, 53, 153, 159, 459, 477, 887, 901, 1431, 2661, 2703, 7983, 8109, 15079, 23949, 24327, 45237, 47011, 135711, 141033, 407133, 423099, 799187, 1269297, 2397561, 7192683, 21578049]

約数ペア:

[(1, 21578049), (3, 7192683), (9, 2397561), (17, 1269297), (27, 799187), (51, 423099), (53, 407133), (153, 141033), (159, 135711), (459, 47011), (477, 45237), (887, 24327), (901, 23949), (1431, 15079), (2661, 8109), (2703, 7983)]