19219940

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6121}}^1$

素因数の和:6287

約数の個数: 24

約数和(自身を含む): 40625592

約数和(自身を除く): 21405652

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6121, 12242, 24484, 30605, 61210, 122420, 960997, 1921994, 3843988, 4804985, 9609970, 19219940]

約数ペア:

[(1, 19219940), (2, 9609970), (4, 4804985), (5, 3843988), (10, 1921994), (20, 960997), (157, 122420), (314, 61210), (628, 30605), (785, 24484), (1570, 12242), (3140, 6121)]