20019712

素因数分解:

$2^9\times {\mathrm{61}}^1\times {\mathrm{641}}^1$

素因数の和:720

約数の個数: 40

約数和(自身を含む): 40719492

約数和(自身を除く): 20699780

約数列:

[1, 2, 4, 8, 16, 32, 61, 64, 122, 128, 244, 256, 488, 512, 641, 976, 1282, 1952, 2564, 3904, 5128, 7808, 10256, 15616, 20512, 31232, 39101, 41024, 78202, 82048, 156404, 164096, 312808, 328192, 625616, 1251232, 2502464, 5004928, 10009856, 20019712]

約数ペア:

[(1, 20019712), (2, 10009856), (4, 5004928), (8, 2502464), (16, 1251232), (32, 625616), (61, 328192), (64, 312808), (122, 164096), (128, 156404), (244, 82048), (256, 78202), (488, 41024), (512, 39101), (641, 31232), (976, 20512), (1282, 15616), (1952, 10256), (2564, 7808), (3904, 5128)]