18915708925

素因数分解:

$5^2\times {\mathrm{29}}^2\times {\mathrm{421}}^1\times {\mathrm{2137}}^1$

素因数の和:2626

約数の個数: 36

約数和(自身を含む): 24361274236

約数和(自身を除く): 5445565311

約数列:

[1, 5, 25, 29, 145, 421, 725, 841, 2105, 2137, 4205, 10525, 10685, 12209, 21025, 53425, 61045, 61973, 305225, 309865, 354061, 899677, 1549325, 1770305, 1797217, 4498385, 8851525, 8986085, 22491925, 26090633, 44930425, 130453165, 652265825, 756628357, 3783141785, 18915708925]

約数ペア:

[(1, 18915708925), (5, 3783141785), (25, 756628357), (29, 652265825), (145, 130453165), (421, 44930425), (725, 26090633), (841, 22491925), (2105, 8986085), (2137, 8851525), (4205, 4498385), (10525, 1797217), (10685, 1770305), (12209, 1549325), (21025, 899677), (53425, 354061), (61045, 309865), (61973, 305225)]