19998121825

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{347}}^1\times {\mathrm{209569}}^1$

素因数の和:209937

約数の個数: 24

約数和(自身を含む): 27130093920

約数和(自身を除く): 7131972095

約数列:

[1, 5, 11, 25, 55, 275, 347, 1735, 3817, 8675, 19085, 95425, 209569, 1047845, 2305259, 5239225, 11526295, 57631475, 72720443, 363602215, 799924873, 1818011075, 3999624365, 19998121825]

約数ペア:

[(1, 19998121825), (5, 3999624365), (11, 1818011075), (25, 799924873), (55, 363602215), (275, 72720443), (347, 57631475), (1735, 11526295), (3817, 5239225), (8675, 2305259), (19085, 1047845), (95425, 209569)]