21697671

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:243

約数の個数: 32

約数和(自身を含む): 31629312

約数和(自身を除く): 9931641

約数列:

[1, 3, 23, 43, 69, 71, 103, 129, 213, 309, 989, 1633, 2369, 2967, 3053, 4429, 4899, 7107, 7313, 9159, 13287, 21939, 70219, 101867, 168199, 210657, 305601, 314459, 504597, 943377, 7232557, 21697671]

約数ペア:

[(1, 21697671), (3, 7232557), (23, 943377), (43, 504597), (69, 314459), (71, 305601), (103, 210657), (129, 168199), (213, 101867), (309, 70219), (989, 21939), (1633, 13287), (2369, 9159), (2967, 7313), (3053, 7107), (4429, 4899)]