81977560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{292777}}^1$

素因数の和:292795

約数の個数: 32

約数和(自身を含む): 210800160

約数和(自身を除く): 128822600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 292777, 585554, 1171108, 1463885, 2049439, 2342216, 2927770, 4098878, 5855540, 8197756, 10247195, 11711080, 16395512, 20494390, 40988780, 81977560]

約数ペア:

[(1, 81977560), (2, 40988780), (4, 20494390), (5, 16395512), (7, 11711080), (8, 10247195), (10, 8197756), (14, 5855540), (20, 4098878), (28, 2927770), (35, 2342216), (40, 2049439), (56, 1463885), (70, 1171108), (140, 585554), (280, 292777)]