21421960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76507}}^1$

素因数の和:76525

約数の個数: 32

約数和(自身を含む): 55085760

約数和(自身を除く): 33663800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76507, 153014, 306028, 382535, 535549, 612056, 765070, 1071098, 1530140, 2142196, 2677745, 3060280, 4284392, 5355490, 10710980, 21421960]

約数ペア:

[(1, 21421960), (2, 10710980), (4, 5355490), (5, 4284392), (7, 3060280), (8, 2677745), (10, 2142196), (14, 1530140), (20, 1071098), (28, 765070), (35, 612056), (40, 535549), (56, 382535), (70, 306028), (140, 153014), (280, 76507)]