81979660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{585569}}^1$

素因数の和:585585

約数の個数: 24

約数和(自身を含む): 196751520

約数和(自身を除く): 114771860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 585569, 1171138, 2342276, 2927845, 4098983, 5855690, 8197966, 11711380, 16395932, 20494915, 40989830, 81979660]

約数ペア:

[(1, 81979660), (2, 40989830), (4, 20494915), (5, 16395932), (7, 11711380), (10, 8197966), (14, 5855690), (20, 4098983), (28, 2927845), (35, 2342276), (70, 1171138), (140, 585569)]