19876880

素因数分解:

$2^4\times 5^1\times {\mathrm{248461}}^1$

素因数の和:248474

約数の個数: 20

約数和(自身を含む): 46213932

約数和(自身を除く): 26337052

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248461, 496922, 993844, 1242305, 1987688, 2484610, 3975376, 4969220, 9938440, 19876880]

約数ペア:

[(1, 19876880), (2, 9938440), (4, 4969220), (5, 3975376), (8, 2484610), (10, 1987688), (16, 1242305), (20, 993844), (40, 496922), (80, 248461)]