18778095

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{641}}^1$

素因数の和:693

約数の個数: 64

約数和(自身を含む): 39444480

約数和(自身を除く): 20666385

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 31, 35, 45, 63, 93, 105, 135, 155, 189, 217, 279, 315, 465, 641, 651, 837, 945, 1085, 1395, 1923, 1953, 3205, 3255, 4185, 4487, 5769, 5859, 9615, 9765, 13461, 17307, 19871, 22435, 28845, 29295, 40383, 59613, 67305, 86535, 99355, 121149, 139097, 178839, 201915, 298065, 417291, 536517, 605745, 695485, 894195, 1251873, 2086455, 2682585, 3755619, 6259365, 18778095]

約数ペア:

[(1, 18778095), (3, 6259365), (5, 3755619), (7, 2682585), (9, 2086455), (15, 1251873), (21, 894195), (27, 695485), (31, 605745), (35, 536517), (45, 417291), (63, 298065), (93, 201915), (105, 178839), (135, 139097), (155, 121149), (189, 99355), (217, 86535), (279, 67305), (315, 59613), (465, 40383), (641, 29295), (651, 28845), (837, 22435), (945, 19871), (1085, 17307), (1395, 13461), (1923, 9765), (1953, 9615), (3205, 5859), (3255, 5769), (4185, 4487)]