20542535

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:227

約数の個数: 32

約数和(自身を含む): 27760320

約数和(自身を除く): 7217785

約数列:

[1, 5, 13, 53, 65, 67, 89, 265, 335, 445, 689, 871, 1157, 3445, 3551, 4355, 4717, 5785, 5963, 17755, 23585, 29815, 46163, 61321, 77519, 230815, 306605, 316039, 387595, 1580195, 4108507, 20542535]

約数ペア:

[(1, 20542535), (5, 4108507), (13, 1580195), (53, 387595), (65, 316039), (67, 306605), (89, 230815), (265, 77519), (335, 61321), (445, 46163), (689, 29815), (871, 23585), (1157, 17755), (3445, 5963), (3551, 5785), (4355, 4717)]