199820

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:209

約数の個数: 24

約数和(自身を含む): 428064

約数和(自身を除く): 228244

約数列:

[1, 2, 4, 5, 10, 20, 97, 103, 194, 206, 388, 412, 485, 515, 970, 1030, 1940, 2060, 9991, 19982, 39964, 49955, 99910, 199820]

約数ペア:

[(1, 199820), (2, 99910), (4, 49955), (5, 39964), (10, 19982), (20, 9991), (97, 2060), (103, 1940), (194, 1030), (206, 970), (388, 515), (412, 485)]