20767551

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1$

素因数の和:156

約数の個数: 64

約数和(自身を含む): 36372480

約数和(自身を除く): 15604929

約数列:

[1, 3, 7, 19, 21, 23, 31, 57, 69, 73, 93, 133, 161, 217, 219, 399, 437, 483, 511, 589, 651, 713, 1311, 1387, 1533, 1679, 1767, 2139, 2263, 3059, 4123, 4161, 4991, 5037, 6789, 9177, 9709, 11753, 12369, 13547, 14973, 15841, 29127, 31901, 35259, 40641, 42997, 47523, 52049, 94829, 95703, 128991, 156147, 223307, 284487, 300979, 364343, 669921, 902937, 988931, 1093029, 2966793, 6922517, 20767551]

約数ペア:

[(1, 20767551), (3, 6922517), (7, 2966793), (19, 1093029), (21, 988931), (23, 902937), (31, 669921), (57, 364343), (69, 300979), (73, 284487), (93, 223307), (133, 156147), (161, 128991), (217, 95703), (219, 94829), (399, 52049), (437, 47523), (483, 42997), (511, 40641), (589, 35259), (651, 31901), (713, 29127), (1311, 15841), (1387, 14973), (1533, 13547), (1679, 12369), (1767, 11753), (2139, 9709), (2263, 9177), (3059, 6789), (4123, 5037), (4161, 4991)]