20178981

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{1373}}^1$

素因数の和:1473

約数の個数: 24

約数和(自身を含む): 30865536

約数和(自身を除く): 10686555

約数列:

[1, 3, 9, 23, 69, 71, 207, 213, 639, 1373, 1633, 4119, 4899, 12357, 14697, 31579, 94737, 97483, 284211, 292449, 877347, 2242109, 6726327, 20178981]

約数ペア:

[(1, 20178981), (3, 6726327), (9, 2242109), (23, 877347), (69, 292449), (71, 284211), (207, 97483), (213, 94737), (639, 31579), (1373, 14697), (1633, 12357), (4119, 4899)]