21247785

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{12107}}^1$

素因数の和:12134

約数の個数: 32

約数和(自身を含む): 40682880

約数和(自身を除く): 19435095

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 117, 135, 195, 351, 585, 1755, 12107, 36321, 60535, 108963, 157391, 181605, 326889, 472173, 544815, 786955, 1416519, 1634445, 2360865, 4249557, 7082595, 21247785]

約数ペア:

[(1, 21247785), (3, 7082595), (5, 4249557), (9, 2360865), (13, 1634445), (15, 1416519), (27, 786955), (39, 544815), (45, 472173), (65, 326889), (117, 181605), (135, 157391), (195, 108963), (351, 60535), (585, 36321), (1755, 12107)]