19664140

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4409}}^1$

素因数の和:4641

約数の個数: 24

約数和(自身を含む): 41489280

約数和(自身を除く): 21825140

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4409, 4460, 8818, 17636, 22045, 44090, 88180, 983207, 1966414, 3932828, 4916035, 9832070, 19664140]

約数ペア:

[(1, 19664140), (2, 9832070), (4, 4916035), (5, 3932828), (10, 1966414), (20, 983207), (223, 88180), (446, 44090), (892, 22045), (1115, 17636), (2230, 8818), (4409, 4460)]