20715880

素因数分解:

$2^3\times 5^1\times {\mathrm{571}}^1\times {\mathrm{907}}^1$

素因数の和:1489

約数の個数: 32

約数和(自身を含む): 46743840

約数和(自身を除く): 26027960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 571, 907, 1142, 1814, 2284, 2855, 3628, 4535, 4568, 5710, 7256, 9070, 11420, 18140, 22840, 36280, 517897, 1035794, 2071588, 2589485, 4143176, 5178970, 10357940, 20715880]

約数ペア:

[(1, 20715880), (2, 10357940), (4, 5178970), (5, 4143176), (8, 2589485), (10, 2071588), (20, 1035794), (40, 517897), (571, 36280), (907, 22840), (1142, 18140), (1814, 11420), (2284, 9070), (2855, 7256), (3628, 5710), (4535, 4568)]