20555865

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{317}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 39289536

約数和(自身を除く): 18733671

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 131, 165, 317, 393, 495, 655, 951, 1179, 1441, 1585, 1965, 2853, 3487, 4323, 4755, 5895, 7205, 10461, 12969, 14265, 17435, 21615, 31383, 41527, 52305, 64845, 124581, 156915, 207635, 373743, 456797, 622905, 1370391, 1868715, 2283985, 4111173, 6851955, 20555865]

約数ペア:

[(1, 20555865), (3, 6851955), (5, 4111173), (9, 2283985), (11, 1868715), (15, 1370391), (33, 622905), (45, 456797), (55, 373743), (99, 207635), (131, 156915), (165, 124581), (317, 64845), (393, 52305), (495, 41527), (655, 31383), (951, 21615), (1179, 17435), (1441, 14265), (1585, 12969), (1965, 10461), (2853, 7205), (3487, 5895), (4323, 4755)]