20417595

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{251}}^1$

素因数の和:316

約数の個数: 64

約数和(自身を含む): 39191040

約数和(自身を除く): 18773445

約数列:

[1, 3, 5, 11, 15, 17, 29, 33, 51, 55, 85, 87, 145, 165, 187, 251, 255, 319, 435, 493, 561, 753, 935, 957, 1255, 1479, 1595, 2465, 2761, 2805, 3765, 4267, 4785, 5423, 7279, 7395, 8283, 12801, 13805, 16269, 21335, 21837, 27115, 36395, 41415, 46937, 64005, 80069, 81345, 109185, 123743, 140811, 234685, 240207, 371229, 400345, 618715, 704055, 1201035, 1361173, 1856145, 4083519, 6805865, 20417595]

約数ペア:

[(1, 20417595), (3, 6805865), (5, 4083519), (11, 1856145), (15, 1361173), (17, 1201035), (29, 704055), (33, 618715), (51, 400345), (55, 371229), (85, 240207), (87, 234685), (145, 140811), (165, 123743), (187, 109185), (251, 81345), (255, 80069), (319, 64005), (435, 46937), (493, 41415), (561, 36395), (753, 27115), (935, 21837), (957, 21335), (1255, 16269), (1479, 13805), (1595, 12801), (2465, 8283), (2761, 7395), (2805, 7279), (3765, 5423), (4267, 4785)]