19699780

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{103}}^1\times {\mathrm{131}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 42666624

約数和(自身を除く): 22966844

約数列:

[1, 2, 4, 5, 10, 20, 73, 103, 131, 146, 206, 262, 292, 365, 412, 515, 524, 655, 730, 1030, 1310, 1460, 2060, 2620, 7519, 9563, 13493, 15038, 19126, 26986, 30076, 37595, 38252, 47815, 53972, 67465, 75190, 95630, 134930, 150380, 191260, 269860, 984989, 1969978, 3939956, 4924945, 9849890, 19699780]

約数ペア:

[(1, 19699780), (2, 9849890), (4, 4924945), (5, 3939956), (10, 1969978), (20, 984989), (73, 269860), (103, 191260), (131, 150380), (146, 134930), (206, 95630), (262, 75190), (292, 67465), (365, 53972), (412, 47815), (515, 38252), (524, 37595), (655, 30076), (730, 26986), (1030, 19126), (1310, 15038), (1460, 13493), (2060, 9563), (2620, 7519)]