20695905

素因数分解:

$3^4\times 5^1\times {\mathrm{137}}^1\times {\mathrm{373}}^1$

素因数の和:527

約数の個数: 40

約数和(自身を含む): 37470312

約数和(自身を除く): 16774407

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 137, 373, 405, 411, 685, 1119, 1233, 1865, 2055, 3357, 3699, 5595, 6165, 10071, 11097, 16785, 18495, 30213, 50355, 51101, 55485, 151065, 153303, 255505, 459909, 766515, 1379727, 2299545, 4139181, 6898635, 20695905]

約数ペア:

[(1, 20695905), (3, 6898635), (5, 4139181), (9, 2299545), (15, 1379727), (27, 766515), (45, 459909), (81, 255505), (135, 153303), (137, 151065), (373, 55485), (405, 51101), (411, 50355), (685, 30213), (1119, 18495), (1233, 16785), (1865, 11097), (2055, 10071), (3357, 6165), (3699, 5595)]