216419920

素因数分解:

$2^4\times 5^1\times {\mathrm{2705249}}^1$

素因数の和:2705262

約数の個数: 20

約数和(自身を含む): 503176500

約数和(自身を除く): 286756580

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2705249, 5410498, 10820996, 13526245, 21641992, 27052490, 43283984, 54104980, 108209960, 216419920]

約数ペア:

[(1, 216419920), (2, 108209960), (4, 54104980), (5, 43283984), (8, 27052490), (10, 21641992), (16, 13526245), (20, 10820996), (40, 5410498), (80, 2705249)]