20975416

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{2003}}^1$

素因数の和:2044

約数の個数: 64

約数和(自身を含む): 51943680

約数和(自身を除く): 30968264

約数列:

[1, 2, 4, 7, 8, 11, 14, 17, 22, 28, 34, 44, 56, 68, 77, 88, 119, 136, 154, 187, 238, 308, 374, 476, 616, 748, 952, 1309, 1496, 2003, 2618, 4006, 5236, 8012, 10472, 14021, 16024, 22033, 28042, 34051, 44066, 56084, 68102, 88132, 112168, 136204, 154231, 176264, 238357, 272408, 308462, 374561, 476714, 616924, 749122, 953428, 1233848, 1498244, 1906856, 2621927, 2996488, 5243854, 10487708, 20975416]

約数ペア:

[(1, 20975416), (2, 10487708), (4, 5243854), (7, 2996488), (8, 2621927), (11, 1906856), (14, 1498244), (17, 1233848), (22, 953428), (28, 749122), (34, 616924), (44, 476714), (56, 374561), (68, 308462), (77, 272408), (88, 238357), (119, 176264), (136, 154231), (154, 136204), (187, 112168), (238, 88132), (308, 68102), (374, 56084), (476, 44066), (616, 34051), (748, 28042), (952, 22033), (1309, 16024), (1496, 14021), (2003, 10472), (2618, 8012), (4006, 5236)]