20421520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{36467}}^1$

素因数の和:36487

約数の個数: 40

約数和(自身を含む): 54264384

約数和(自身を除く): 33842864

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 36467, 72934, 145868, 182335, 255269, 291736, 364670, 510538, 583472, 729340, 1021076, 1276345, 1458680, 2042152, 2552690, 2917360, 4084304, 5105380, 10210760, 20421520]

約数ペア:

[(1, 20421520), (2, 10210760), (4, 5105380), (5, 4084304), (7, 2917360), (8, 2552690), (10, 2042152), (14, 1458680), (16, 1276345), (20, 1021076), (28, 729340), (35, 583472), (40, 510538), (56, 364670), (70, 291736), (80, 255269), (112, 182335), (140, 145868), (280, 72934), (560, 36467)]