21232880

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{229}}^1$

素因数の和:322

約数の個数: 80

約数和(自身を含む): 53047200

約数和(自身を除く): 31814320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 61, 76, 80, 95, 122, 152, 190, 229, 244, 304, 305, 380, 458, 488, 610, 760, 916, 976, 1145, 1159, 1220, 1520, 1832, 2290, 2318, 2440, 3664, 4351, 4580, 4636, 4880, 5795, 8702, 9160, 9272, 11590, 13969, 17404, 18320, 18544, 21755, 23180, 27938, 34808, 43510, 46360, 55876, 69616, 69845, 87020, 92720, 111752, 139690, 174040, 223504, 265411, 279380, 348080, 530822, 558760, 1061644, 1117520, 1327055, 2123288, 2654110, 4246576, 5308220, 10616440, 21232880]

約数ペア:

[(1, 21232880), (2, 10616440), (4, 5308220), (5, 4246576), (8, 2654110), (10, 2123288), (16, 1327055), (19, 1117520), (20, 1061644), (38, 558760), (40, 530822), (61, 348080), (76, 279380), (80, 265411), (95, 223504), (122, 174040), (152, 139690), (190, 111752), (229, 92720), (244, 87020), (304, 69845), (305, 69616), (380, 55876), (458, 46360), (488, 43510), (610, 34808), (760, 27938), (916, 23180), (976, 21755), (1145, 18544), (1159, 18320), (1220, 17404), (1520, 13969), (1832, 11590), (2290, 9272), (2318, 9160), (2440, 8702), (3664, 5795), (4351, 4880), (4580, 4636)]