21272419

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{313}}^1$

素因数の和:419

約数の個数: 24

約数和(自身を含む): 26489040

約数和(自身を除く): 5216621

約数列:

[1, 7, 19, 49, 73, 133, 313, 511, 931, 1387, 2191, 3577, 5947, 9709, 15337, 22849, 41629, 67963, 159943, 291403, 434131, 1119601, 3038917, 21272419]

約数ペア:

[(1, 21272419), (7, 3038917), (19, 1119601), (49, 434131), (73, 291403), (133, 159943), (313, 67963), (511, 41629), (931, 22849), (1387, 15337), (2191, 9709), (3577, 5947)]