21970312

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{293}}^1$

素因数の和:422

約数の個数: 64

約数和(自身を含む): 51367680

約数和(自身を除く): 29397368

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 103, 104, 182, 206, 293, 364, 412, 586, 721, 728, 824, 1172, 1339, 1442, 2051, 2344, 2678, 2884, 3809, 4102, 5356, 5768, 7618, 8204, 9373, 10712, 15236, 16408, 18746, 26663, 30179, 30472, 37492, 53326, 60358, 74984, 106652, 120716, 211253, 213304, 241432, 392327, 422506, 784654, 845012, 1569308, 1690024, 2746289, 3138616, 5492578, 10985156, 21970312]

約数ペア:

[(1, 21970312), (2, 10985156), (4, 5492578), (7, 3138616), (8, 2746289), (13, 1690024), (14, 1569308), (26, 845012), (28, 784654), (52, 422506), (56, 392327), (91, 241432), (103, 213304), (104, 211253), (182, 120716), (206, 106652), (293, 74984), (364, 60358), (412, 53326), (586, 37492), (721, 30472), (728, 30179), (824, 26663), (1172, 18746), (1339, 16408), (1442, 15236), (2051, 10712), (2344, 9373), (2678, 8204), (2884, 7618), (3809, 5768), (4102, 5356)]