21784280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{77801}}^1$

素因数の和:77819

約数の個数: 32

約数和(自身を含む): 56017440

約数和(自身を除く): 34233160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 77801, 155602, 311204, 389005, 544607, 622408, 778010, 1089214, 1556020, 2178428, 2723035, 3112040, 4356856, 5446070, 10892140, 21784280]

約数ペア:

[(1, 21784280), (2, 10892140), (4, 5446070), (5, 4356856), (7, 3112040), (8, 2723035), (10, 2178428), (14, 1556020), (20, 1089214), (28, 778010), (35, 622408), (40, 544607), (56, 389005), (70, 311204), (140, 155602), (280, 77801)]