21783987

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{173}}^1\times {\mathrm{823}}^1$

素因数の和:1019

約数の個数: 24

約数和(自身を含む): 33549984

約数和(自身を除く): 11765997

約数列:

[1, 3, 9, 17, 51, 153, 173, 519, 823, 1557, 2469, 2941, 7407, 8823, 13991, 26469, 41973, 125919, 142379, 427137, 1281411, 2420443, 7261329, 21783987]

約数ペア:

[(1, 21783987), (3, 7261329), (9, 2420443), (17, 1281411), (51, 427137), (153, 142379), (173, 125919), (519, 41973), (823, 26469), (1557, 13991), (2469, 8823), (2941, 7407)]