21640677

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{971}}^1$

素因数の和:1033

約数の個数: 32

約数和(自身を含む): 33592320

約数和(自身を除く): 11951643

約数列:

[1, 3, 17, 19, 23, 51, 57, 69, 323, 391, 437, 969, 971, 1173, 1311, 2913, 7429, 16507, 18449, 22287, 22333, 49521, 55347, 66999, 313633, 379661, 424327, 940899, 1138983, 1272981, 7213559, 21640677]

約数ペア:

[(1, 21640677), (3, 7213559), (17, 1272981), (19, 1138983), (23, 940899), (51, 424327), (57, 379661), (69, 313633), (323, 66999), (391, 55347), (437, 49521), (969, 22333), (971, 22287), (1173, 18449), (1311, 16507), (2913, 7429)]