20814651

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{599}}^1$

素因数の和:638

約数の個数: 48

約数和(自身を含む): 36691200

約数和(自身を除く): 15876549

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 81, 99, 117, 143, 243, 297, 351, 429, 599, 891, 1053, 1287, 1797, 2673, 3159, 3861, 5391, 6589, 7787, 11583, 16173, 19767, 23361, 34749, 48519, 59301, 70083, 85657, 145557, 177903, 210249, 256971, 533709, 630747, 770913, 1601127, 1892241, 2312739, 6938217, 20814651]

約数ペア:

[(1, 20814651), (3, 6938217), (9, 2312739), (11, 1892241), (13, 1601127), (27, 770913), (33, 630747), (39, 533709), (81, 256971), (99, 210249), (117, 177903), (143, 145557), (243, 85657), (297, 70083), (351, 59301), (429, 48519), (599, 34749), (891, 23361), (1053, 19767), (1287, 16173), (1797, 11583), (2673, 7787), (3159, 6589), (3861, 5391)]