1991409

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1$

素因数の和:90

約数の個数: 48

約数和(自身を含む): 3502080

約数和(自身を除く): 1510671

約数列:

[1, 3, 7, 19, 21, 23, 31, 49, 57, 69, 93, 133, 147, 161, 217, 399, 437, 483, 589, 651, 713, 931, 1127, 1311, 1519, 1767, 2139, 2793, 3059, 3381, 4123, 4557, 4991, 9177, 12369, 13547, 14973, 21413, 28861, 34937, 40641, 64239, 86583, 94829, 104811, 284487, 663803, 1991409]

約数ペア:

[(1, 1991409), (3, 663803), (7, 284487), (19, 104811), (21, 94829), (23, 86583), (31, 64239), (49, 40641), (57, 34937), (69, 28861), (93, 21413), (133, 14973), (147, 13547), (161, 12369), (217, 9177), (399, 4991), (437, 4557), (483, 4123), (589, 3381), (651, 3059), (713, 2793), (931, 2139), (1127, 1767), (1311, 1519)]