28389890

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{641}}^1$

素因数の和:794

約数の個数: 32

約数和(自身を含む): 52880256

約数和(自身を除く): 24490366

約数列:

[1, 2, 5, 10, 43, 86, 103, 206, 215, 430, 515, 641, 1030, 1282, 3205, 4429, 6410, 8858, 22145, 27563, 44290, 55126, 66023, 132046, 137815, 275630, 330115, 660230, 2838989, 5677978, 14194945, 28389890]

約数ペア:

[(1, 28389890), (2, 14194945), (5, 5677978), (10, 2838989), (43, 660230), (86, 330115), (103, 275630), (206, 137815), (215, 132046), (430, 66023), (515, 55126), (641, 44290), (1030, 27563), (1282, 22145), (3205, 8858), (4429, 6410)]