20161840

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5861}}^1$

素因数の和:5917

約数の個数: 40

約数和(自身を含む): 47974608

約数和(自身を除く): 27812768

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5861, 11722, 23444, 29305, 46888, 58610, 93776, 117220, 234440, 252023, 468880, 504046, 1008092, 1260115, 2016184, 2520230, 4032368, 5040460, 10080920, 20161840]

約数ペア:

[(1, 20161840), (2, 10080920), (4, 5040460), (5, 4032368), (8, 2520230), (10, 2016184), (16, 1260115), (20, 1008092), (40, 504046), (43, 468880), (80, 252023), (86, 234440), (172, 117220), (215, 93776), (344, 58610), (430, 46888), (688, 29305), (860, 23444), (1720, 11722), (3440, 5861)]