20981808

素因数分解:

$2^4\times 3^3\times {\mathrm{17}}^1\times {\mathrm{2857}}^1$

素因数の和:2891

約数の個数: 80

約数和(自身を含む): 63790560

約数和(自身を除く): 42808752

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 17, 18, 24, 27, 34, 36, 48, 51, 54, 68, 72, 102, 108, 136, 144, 153, 204, 216, 272, 306, 408, 432, 459, 612, 816, 918, 1224, 1836, 2448, 2857, 3672, 5714, 7344, 8571, 11428, 17142, 22856, 25713, 34284, 45712, 48569, 51426, 68568, 77139, 97138, 102852, 137136, 145707, 154278, 194276, 205704, 291414, 308556, 388552, 411408, 437121, 582828, 617112, 777104, 874242, 1165656, 1234224, 1311363, 1748484, 2331312, 2622726, 3496968, 5245452, 6993936, 10490904, 20981808]

約数ペア:

[(1, 20981808), (2, 10490904), (3, 6993936), (4, 5245452), (6, 3496968), (8, 2622726), (9, 2331312), (12, 1748484), (16, 1311363), (17, 1234224), (18, 1165656), (24, 874242), (27, 777104), (34, 617112), (36, 582828), (48, 437121), (51, 411408), (54, 388552), (68, 308556), (72, 291414), (102, 205704), (108, 194276), (136, 154278), (144, 145707), (153, 137136), (204, 102852), (216, 97138), (272, 77139), (306, 68568), (408, 51426), (432, 48569), (459, 45712), (612, 34284), (816, 25713), (918, 22856), (1224, 17142), (1836, 11428), (2448, 8571), (2857, 7344), (3672, 5714)]