20998998

素因数分解:

$2^1\times 3^2\times {\mathrm{389}}^1\times {\mathrm{2999}}^1$

素因数の和:3396

約数の個数: 24

約数和(自身を含む): 45630000

約数和(自身を除く): 24631002

約数列:

[1, 2, 3, 6, 9, 18, 389, 778, 1167, 2334, 2999, 3501, 5998, 7002, 8997, 17994, 26991, 53982, 1166611, 2333222, 3499833, 6999666, 10499499, 20998998]

約数ペア:

[(1, 20998998), (2, 10499499), (3, 6999666), (6, 3499833), (9, 2333222), (18, 1166611), (389, 53982), (778, 26991), (1167, 17994), (2334, 8997), (2999, 7002), (3501, 5998)]