19644920

素因数分解:

$2^3\times 5^1\times {\mathrm{661}}^1\times {\mathrm{743}}^1$

素因数の和:1415

約数の個数: 32

約数和(自身を含む): 44327520

約数和(自身を除く): 24682600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 661, 743, 1322, 1486, 2644, 2972, 3305, 3715, 5288, 5944, 6610, 7430, 13220, 14860, 26440, 29720, 491123, 982246, 1964492, 2455615, 3928984, 4911230, 9822460, 19644920]

約数ペア:

[(1, 19644920), (2, 9822460), (4, 4911230), (5, 3928984), (8, 2455615), (10, 1964492), (20, 982246), (40, 491123), (661, 29720), (743, 26440), (1322, 14860), (1486, 13220), (2644, 7430), (2972, 6610), (3305, 5944), (3715, 5288)]