19994440

素因数分解:

$2^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{1597}}^1$

素因数の和:1921

約数の個数: 32

約数和(自身を含む): 45159480

約数和(自身を除く): 25165040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 313, 626, 1252, 1565, 1597, 2504, 3130, 3194, 6260, 6388, 7985, 12520, 12776, 15970, 31940, 63880, 499861, 999722, 1999444, 2499305, 3998888, 4998610, 9997220, 19994440]

約数ペア:

[(1, 19994440), (2, 9997220), (4, 4998610), (5, 3998888), (8, 2499305), (10, 1999444), (20, 999722), (40, 499861), (313, 63880), (626, 31940), (1252, 15970), (1565, 12776), (1597, 12520), (2504, 7985), (3130, 6388), (3194, 6260)]