20674845

素因数分解:

$3^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{719}}^1$

素因数の和:807

約数の個数: 40

約数和(自身を含む): 37635840

約数和(自身を除く): 16960995

約数列:

[1, 3, 5, 9, 15, 27, 45, 71, 81, 135, 213, 355, 405, 639, 719, 1065, 1917, 2157, 3195, 3595, 5751, 6471, 9585, 10785, 19413, 28755, 32355, 51049, 58239, 97065, 153147, 255245, 291195, 459441, 765735, 1378323, 2297205, 4134969, 6891615, 20674845]

約数ペア:

[(1, 20674845), (3, 6891615), (5, 4134969), (9, 2297205), (15, 1378323), (27, 765735), (45, 459441), (71, 291195), (81, 255245), (135, 153147), (213, 97065), (355, 58239), (405, 51049), (639, 32355), (719, 28755), (1065, 19413), (1917, 10785), (2157, 9585), (3195, 6471), (3595, 5751)]