64435940

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{20521}}^1$

素因数の和:20687

約数の個数: 24

約数和(自身を含む): 136183992

約数和(自身を除く): 71748052

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 20521, 41042, 82084, 102605, 205210, 410420, 3221797, 6443594, 12887188, 16108985, 32217970, 64435940]

約数ペア:

[(1, 64435940), (2, 32217970), (4, 16108985), (5, 12887188), (10, 6443594), (20, 3221797), (157, 410420), (314, 205210), (628, 102605), (785, 82084), (1570, 41042), (3140, 20521)]