21142856

素因数分解:

$2^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{277}}^1$

素因数の和:366

約数の個数: 64

約数和(自身を含む): 48038400

約数和(自身を除く): 26895544

約数列:

[1, 2, 4, 7, 8, 14, 28, 29, 47, 56, 58, 94, 116, 188, 203, 232, 277, 329, 376, 406, 554, 658, 812, 1108, 1316, 1363, 1624, 1939, 2216, 2632, 2726, 3878, 5452, 7756, 8033, 9541, 10904, 13019, 15512, 16066, 19082, 26038, 32132, 38164, 52076, 56231, 64264, 76328, 91133, 104152, 112462, 182266, 224924, 364532, 377551, 449848, 729064, 755102, 1510204, 2642857, 3020408, 5285714, 10571428, 21142856]

約数ペア:

[(1, 21142856), (2, 10571428), (4, 5285714), (7, 3020408), (8, 2642857), (14, 1510204), (28, 755102), (29, 729064), (47, 449848), (56, 377551), (58, 364532), (94, 224924), (116, 182266), (188, 112462), (203, 104152), (232, 91133), (277, 76328), (329, 64264), (376, 56231), (406, 52076), (554, 38164), (658, 32132), (812, 26038), (1108, 19082), (1316, 16066), (1363, 15512), (1624, 13019), (1939, 10904), (2216, 9541), (2632, 8033), (2726, 7756), (3878, 5452)]