20987890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{281}}^1$

素因数の和:403

約数の個数: 64

約数和(自身を含む): 47755008

約数和(自身を除く): 26767118

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 97, 110, 154, 194, 281, 385, 485, 562, 679, 770, 970, 1067, 1358, 1405, 1967, 2134, 2810, 3091, 3395, 3934, 5335, 6182, 6790, 7469, 9835, 10670, 14938, 15455, 19670, 21637, 27257, 30910, 37345, 43274, 54514, 74690, 108185, 136285, 190799, 216370, 272570, 299827, 381598, 599654, 953995, 1499135, 1907990, 2098789, 2998270, 4197578, 10493945, 20987890]

約数ペア:

[(1, 20987890), (2, 10493945), (5, 4197578), (7, 2998270), (10, 2098789), (11, 1907990), (14, 1499135), (22, 953995), (35, 599654), (55, 381598), (70, 299827), (77, 272570), (97, 216370), (110, 190799), (154, 136285), (194, 108185), (281, 74690), (385, 54514), (485, 43274), (562, 37345), (679, 30910), (770, 27257), (970, 21637), (1067, 19670), (1358, 15455), (1405, 14938), (1967, 10670), (2134, 9835), (2810, 7469), (3091, 6790), (3395, 6182), (3934, 5335)]