19997008

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{607}}^1$

素因数の和:715

約数の個数: 40

約数和(自身を含む): 40711680

約数和(自身を除く): 20714672

約数列:

[1, 2, 4, 8, 16, 29, 58, 71, 116, 142, 232, 284, 464, 568, 607, 1136, 1214, 2059, 2428, 4118, 4856, 8236, 9712, 16472, 17603, 32944, 35206, 43097, 70412, 86194, 140824, 172388, 281648, 344776, 689552, 1249813, 2499626, 4999252, 9998504, 19997008]

約数ペア:

[(1, 19997008), (2, 9998504), (4, 4999252), (8, 2499626), (16, 1249813), (29, 689552), (58, 344776), (71, 281648), (116, 172388), (142, 140824), (232, 86194), (284, 70412), (464, 43097), (568, 35206), (607, 32944), (1136, 17603), (1214, 16472), (2059, 9712), (2428, 8236), (4118, 4856)]