81604040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{291443}}^1$

素因数の和:291461

約数の個数: 32

約数和(自身を含む): 209839680

約数和(自身を除く): 128235640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 291443, 582886, 1165772, 1457215, 2040101, 2331544, 2914430, 4080202, 5828860, 8160404, 10200505, 11657720, 16320808, 20401010, 40802020, 81604040]

約数ペア:

[(1, 81604040), (2, 40802020), (4, 20401010), (5, 16320808), (7, 11657720), (8, 10200505), (10, 8160404), (14, 5828860), (20, 4080202), (28, 2914430), (35, 2331544), (40, 2040101), (56, 1457215), (70, 1165772), (140, 582886), (280, 291443)]