20715920

素因数分解:

$2^4\times 5^1\times {\mathrm{258949}}^1$

素因数の和:258962

約数の個数: 20

約数和(自身を含む): 48164700

約数和(自身を除く): 27448780

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258949, 517898, 1035796, 1294745, 2071592, 2589490, 4143184, 5178980, 10357960, 20715920]

約数ペア:

[(1, 20715920), (2, 10357960), (4, 5178980), (5, 4143184), (8, 2589490), (10, 2071592), (16, 1294745), (20, 1035796), (40, 517898), (80, 258949)]