20891920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37307}}^1$

素因数の和:37327

約数の個数: 40

約数和(自身を含む): 55514304

約数和(自身を除く): 34622384

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 37307, 74614, 149228, 186535, 261149, 298456, 373070, 522298, 596912, 746140, 1044596, 1305745, 1492280, 2089192, 2611490, 2984560, 4178384, 5222980, 10445960, 20891920]

約数ペア:

[(1, 20891920), (2, 10445960), (4, 5222980), (5, 4178384), (7, 2984560), (8, 2611490), (10, 2089192), (14, 1492280), (16, 1305745), (20, 1044596), (28, 746140), (35, 596912), (40, 522298), (56, 373070), (70, 298456), (80, 261149), (112, 186535), (140, 149228), (280, 74614), (560, 37307)]