18400005

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{443}}^1$

素因数の和:538

約数の個数: 48

約数和(自身を含む): 34909056

約数和(自身を除く): 16509051

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 71, 117, 195, 213, 355, 443, 585, 639, 923, 1065, 1329, 2215, 2769, 3195, 3987, 4615, 5759, 6645, 8307, 13845, 17277, 19935, 28795, 31453, 41535, 51831, 86385, 94359, 157265, 259155, 283077, 408889, 471795, 1226667, 1415385, 2044445, 3680001, 6133335, 18400005]

約数ペア:

[(1, 18400005), (3, 6133335), (5, 3680001), (9, 2044445), (13, 1415385), (15, 1226667), (39, 471795), (45, 408889), (65, 283077), (71, 259155), (117, 157265), (195, 94359), (213, 86385), (355, 51831), (443, 41535), (585, 31453), (639, 28795), (923, 19935), (1065, 17277), (1329, 13845), (2215, 8307), (2769, 6645), (3195, 5759), (3987, 4615)]