20121507

素因数分解:

$3^3\times 7^2\times {\mathrm{67}}^1\times {\mathrm{227}}^1$

素因数の和:317

約数の個数: 48

約数和(自身を含む): 35349120

約数和(自身を除く): 15227613

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 67, 147, 189, 201, 227, 441, 469, 603, 681, 1323, 1407, 1589, 1809, 2043, 3283, 4221, 4767, 6129, 9849, 11123, 12663, 14301, 15209, 29547, 33369, 42903, 45627, 88641, 100107, 106463, 136881, 300321, 319389, 410643, 745241, 958167, 2235723, 2874501, 6707169, 20121507]

約数ペア:

[(1, 20121507), (3, 6707169), (7, 2874501), (9, 2235723), (21, 958167), (27, 745241), (49, 410643), (63, 319389), (67, 300321), (147, 136881), (189, 106463), (201, 100107), (227, 88641), (441, 45627), (469, 42903), (603, 33369), (681, 29547), (1323, 15209), (1407, 14301), (1589, 12663), (1809, 11123), (2043, 9849), (3283, 6129), (4221, 4767)]