21339738

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{257}}^1\times {\mathrm{659}}^1$

素因数の和:931

約数の個数: 48

約数和(自身を含む): 53127360

約数和(自身を除く): 31787622

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 257, 514, 659, 771, 1318, 1542, 1799, 1977, 2313, 3598, 3954, 4613, 4626, 5397, 5931, 9226, 10794, 11862, 13839, 16191, 27678, 32382, 41517, 83034, 169363, 338726, 508089, 1016178, 1185541, 1524267, 2371082, 3048534, 3556623, 7113246, 10669869, 21339738]

約数ペア:

[(1, 21339738), (2, 10669869), (3, 7113246), (6, 3556623), (7, 3048534), (9, 2371082), (14, 1524267), (18, 1185541), (21, 1016178), (42, 508089), (63, 338726), (126, 169363), (257, 83034), (514, 41517), (659, 32382), (771, 27678), (1318, 16191), (1542, 13839), (1799, 11862), (1977, 10794), (2313, 9226), (3598, 5931), (3954, 5397), (4613, 4626)]