213406420

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{10789}}^1$

素因数の和:10864

約数の個数: 48

約数和(自身を含む): 478558080

約数和(自身を除く): 265151660

約数列:

[1, 2, 4, 5, 10, 20, 23, 43, 46, 86, 92, 115, 172, 215, 230, 430, 460, 860, 989, 1978, 3956, 4945, 9890, 10789, 19780, 21578, 43156, 53945, 107890, 215780, 248147, 463927, 496294, 927854, 992588, 1240735, 1855708, 2319635, 2481470, 4639270, 4962940, 9278540, 10670321, 21340642, 42681284, 53351605, 106703210, 213406420]

約数ペア:

[(1, 213406420), (2, 106703210), (4, 53351605), (5, 42681284), (10, 21340642), (20, 10670321), (23, 9278540), (43, 4962940), (46, 4639270), (86, 2481470), (92, 2319635), (115, 1855708), (172, 1240735), (215, 992588), (230, 927854), (430, 496294), (460, 463927), (860, 248147), (989, 215780), (1978, 107890), (3956, 53945), (4945, 43156), (9890, 21578), (10789, 19780)]