19870100

素因数分解:

$2^2\times 5^2\times {\mathrm{198701}}^1$

素因数の和:198715

約数の個数: 18

約数和(自身を含む): 43118334

約数和(自身を除く): 23248234

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 198701, 397402, 794804, 993505, 1987010, 3974020, 4967525, 9935050, 19870100]

約数ペア:

[(1, 19870100), (2, 9935050), (4, 4967525), (5, 3974020), (10, 1987010), (20, 993505), (25, 794804), (50, 397402), (100, 198701)]