18720135

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{887}}^1$

素因数の和:972

約数の個数: 48

約数和(自身を含む): 37679616

約数和(自身を除く): 18959481

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 67, 105, 201, 315, 335, 469, 603, 887, 1005, 1407, 2345, 2661, 3015, 4221, 4435, 6209, 7035, 7983, 13305, 18627, 21105, 31045, 39915, 55881, 59429, 93135, 178287, 279405, 297145, 416003, 534861, 891435, 1248009, 2080015, 2674305, 3744027, 6240045, 18720135]

約数ペア:

[(1, 18720135), (3, 6240045), (5, 3744027), (7, 2674305), (9, 2080015), (15, 1248009), (21, 891435), (35, 534861), (45, 416003), (63, 297145), (67, 279405), (105, 178287), (201, 93135), (315, 59429), (335, 55881), (469, 39915), (603, 31045), (887, 21105), (1005, 18627), (1407, 13305), (2345, 7983), (2661, 7035), (3015, 6209), (4221, 4435)]