20680976

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{547}}^1$

素因数の和:711

約数の個数: 40

約数和(自身を含む): 42809760

約数和(自身を除く): 22128784

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 139, 272, 278, 547, 556, 1094, 1112, 2188, 2224, 2363, 4376, 4726, 8752, 9299, 9452, 18598, 18904, 37196, 37808, 74392, 76033, 148784, 152066, 304132, 608264, 1216528, 1292561, 2585122, 5170244, 10340488, 20680976]

約数ペア:

[(1, 20680976), (2, 10340488), (4, 5170244), (8, 2585122), (16, 1292561), (17, 1216528), (34, 608264), (68, 304132), (136, 152066), (139, 148784), (272, 76033), (278, 74392), (547, 37808), (556, 37196), (1094, 18904), (1112, 18598), (2188, 9452), (2224, 9299), (2363, 8752), (4376, 4726)]