19968845

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{127}}^1$

素因数の和:245

約数の個数: 32

約数和(自身を含む): 27095040

約数和(自身を除く): 7126195

約数列:

[1, 5, 13, 41, 59, 65, 127, 205, 295, 533, 635, 767, 1651, 2419, 2665, 3835, 5207, 7493, 8255, 12095, 26035, 31447, 37465, 67691, 97409, 157235, 307213, 338455, 487045, 1536065, 3993769, 19968845]

約数ペア:

[(1, 19968845), (5, 3993769), (13, 1536065), (41, 487045), (59, 338455), (65, 307213), (127, 157235), (205, 97409), (295, 67691), (533, 37465), (635, 31447), (767, 26035), (1651, 12095), (2419, 8255), (2665, 7493), (3835, 5207)]