20907824

素因数分解:

$2^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{139}}^1$

素因数の和:250

約数の個数: 80

約数和(自身を含む): 49996800

約数和(自身を除く): 29088976

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 56, 68, 79, 112, 119, 136, 139, 158, 238, 272, 278, 316, 476, 553, 556, 632, 952, 973, 1106, 1112, 1264, 1343, 1904, 1946, 2212, 2224, 2363, 2686, 3892, 4424, 4726, 5372, 7784, 8848, 9401, 9452, 10744, 10981, 15568, 16541, 18802, 18904, 21488, 21962, 33082, 37604, 37808, 43924, 66164, 75208, 76867, 87848, 132328, 150416, 153734, 175696, 186677, 264656, 307468, 373354, 614936, 746708, 1229872, 1306739, 1493416, 2613478, 2986832, 5226956, 10453912, 20907824]

約数ペア:

[(1, 20907824), (2, 10453912), (4, 5226956), (7, 2986832), (8, 2613478), (14, 1493416), (16, 1306739), (17, 1229872), (28, 746708), (34, 614936), (56, 373354), (68, 307468), (79, 264656), (112, 186677), (119, 175696), (136, 153734), (139, 150416), (158, 132328), (238, 87848), (272, 76867), (278, 75208), (316, 66164), (476, 43924), (553, 37808), (556, 37604), (632, 33082), (952, 21962), (973, 21488), (1106, 18904), (1112, 18802), (1264, 16541), (1343, 15568), (1904, 10981), (1946, 10744), (2212, 9452), (2224, 9401), (2363, 8848), (2686, 7784), (3892, 5372), (4424, 4726)]