20789854840

素因数分解:

$2^3\times 5^1\times {\mathrm{4253}}^1\times {\mathrm{122207}}^1$

素因数の和:126471

約数の個数: 32

約数和(自身を含む): 46788554880

約数和(自身を除く): 25998700040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 4253, 8506, 17012, 21265, 34024, 42530, 85060, 122207, 170120, 244414, 488828, 611035, 977656, 1222070, 2444140, 4888280, 519746371, 1039492742, 2078985484, 2598731855, 4157970968, 5197463710, 10394927420, 20789854840]

約数ペア:

[(1, 20789854840), (2, 10394927420), (4, 5197463710), (5, 4157970968), (8, 2598731855), (10, 2078985484), (20, 1039492742), (40, 519746371), (4253, 4888280), (8506, 2444140), (17012, 1222070), (21265, 977656), (34024, 611035), (42530, 488828), (85060, 244414), (122207, 170120)]