80857840

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{20627}}^1$

素因数の和:20654

約数の個数: 60

約数和(自身を含む): 218698056

約数和(自身を除く): 137840216

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 20627, 41254, 82508, 103135, 144389, 165016, 206270, 288778, 330032, 412540, 577556, 721945, 825080, 1010723, 1155112, 1443890, 1650160, 2021446, 2310224, 2887780, 4042892, 5053615, 5775560, 8085784, 10107230, 11551120, 16171568, 20214460, 40428920, 80857840]

約数ペア:

[(1, 80857840), (2, 40428920), (4, 20214460), (5, 16171568), (7, 11551120), (8, 10107230), (10, 8085784), (14, 5775560), (16, 5053615), (20, 4042892), (28, 2887780), (35, 2310224), (40, 2021446), (49, 1650160), (56, 1443890), (70, 1155112), (80, 1010723), (98, 825080), (112, 721945), (140, 577556), (196, 412540), (245, 330032), (280, 288778), (392, 206270), (490, 165016), (560, 144389), (784, 103135), (980, 82508), (1960, 41254), (3920, 20627)]