28767280

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{3299}}^1$

素因数の和:3421

約数の個数: 40

約数和(自身を含む): 67518000

約数和(自身を除く): 38750720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2180, 3299, 4360, 6598, 8720, 13196, 16495, 26392, 32990, 52784, 65980, 131960, 263920, 359591, 719182, 1438364, 1797955, 2876728, 3595910, 5753456, 7191820, 14383640, 28767280]

約数ペア:

[(1, 28767280), (2, 14383640), (4, 7191820), (5, 5753456), (8, 3595910), (10, 2876728), (16, 1797955), (20, 1438364), (40, 719182), (80, 359591), (109, 263920), (218, 131960), (436, 65980), (545, 52784), (872, 32990), (1090, 26392), (1744, 16495), (2180, 13196), (3299, 8720), (4360, 6598)]