19861540

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^2\times {\mathrm{197}}^1$

素因数の和:348

約数の個数: 36

約数和(自身を含む): 42519708

約数和(自身を除く): 22658168

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 197, 284, 355, 394, 710, 788, 985, 1420, 1970, 3940, 5041, 10082, 13987, 20164, 25205, 27974, 50410, 55948, 69935, 100820, 139870, 279740, 993077, 1986154, 3972308, 4965385, 9930770, 19861540]

約数ペア:

[(1, 19861540), (2, 9930770), (4, 4965385), (5, 3972308), (10, 1986154), (20, 993077), (71, 279740), (142, 139870), (197, 100820), (284, 69935), (355, 55948), (394, 50410), (710, 27974), (788, 25205), (985, 20164), (1420, 13987), (1970, 10082), (3940, 5041)]