21248560

素因数分解:

$2^4\times 5^1\times {\mathrm{265607}}^1$

素因数の和:265620

約数の個数: 20

約数和(自身を含む): 49403088

約数和(自身を除く): 28154528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 265607, 531214, 1062428, 1328035, 2124856, 2656070, 4249712, 5312140, 10624280, 21248560]

約数ペア:

[(1, 21248560), (2, 10624280), (4, 5312140), (5, 4249712), (8, 2656070), (10, 2124856), (16, 1328035), (20, 1062428), (40, 531214), (80, 265607)]