21222280

素因数分解:

$2^3\times 5^1\times {\mathrm{193}}^1\times {\mathrm{2749}}^1$

素因数の和:2953

約数の個数: 32

約数和(自身を含む): 48015000

約数和(自身を除く): 26792720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 193, 386, 772, 965, 1544, 1930, 2749, 3860, 5498, 7720, 10996, 13745, 21992, 27490, 54980, 109960, 530557, 1061114, 2122228, 2652785, 4244456, 5305570, 10611140, 21222280]

約数ペア:

[(1, 21222280), (2, 10611140), (4, 5305570), (5, 4244456), (8, 2652785), (10, 2122228), (20, 1061114), (40, 530557), (193, 109960), (386, 54980), (772, 27490), (965, 21992), (1544, 13745), (1930, 10996), (2749, 7720), (3860, 5498)]