19800100

素因数分解:

$2^2\times 5^2\times {\mathrm{389}}^1\times {\mathrm{509}}^1$

素因数の和:912

約数の個数: 36

約数和(自身を含む): 43161300

約数和(自身を除く): 23361200

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 389, 509, 778, 1018, 1556, 1945, 2036, 2545, 3890, 5090, 7780, 9725, 10180, 12725, 19450, 25450, 38900, 50900, 198001, 396002, 792004, 990005, 1980010, 3960020, 4950025, 9900050, 19800100]

約数ペア:

[(1, 19800100), (2, 9900050), (4, 4950025), (5, 3960020), (10, 1980010), (20, 990005), (25, 792004), (50, 396002), (100, 198001), (389, 50900), (509, 38900), (778, 25450), (1018, 19450), (1556, 12725), (1945, 10180), (2036, 9725), (2545, 7780), (3890, 5090)]