20756862

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{257}}^1\times {\mathrm{641}}^1$

素因数の和:913

約数の個数: 48

約数和(自身を含む): 51678432

約数和(自身を除く): 30921570

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 257, 514, 641, 771, 1282, 1542, 1799, 1923, 2313, 3598, 3846, 4487, 4626, 5397, 5769, 8974, 10794, 11538, 13461, 16191, 26922, 32382, 40383, 80766, 164737, 329474, 494211, 988422, 1153159, 1482633, 2306318, 2965266, 3459477, 6918954, 10378431, 20756862]

約数ペア:

[(1, 20756862), (2, 10378431), (3, 6918954), (6, 3459477), (7, 2965266), (9, 2306318), (14, 1482633), (18, 1153159), (21, 988422), (42, 494211), (63, 329474), (126, 164737), (257, 80766), (514, 40383), (641, 32382), (771, 26922), (1282, 16191), (1542, 13461), (1799, 11538), (1923, 10794), (2313, 8974), (3598, 5769), (3846, 5397), (4487, 4626)]