21479975

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4111}}^1$

素因数の和:4151

約数の個数: 24

約数和(自身を含む): 30593280

約数和(自身を除く): 9113305

約数列:

[1, 5, 11, 19, 25, 55, 95, 209, 275, 475, 1045, 4111, 5225, 20555, 45221, 78109, 102775, 226105, 390545, 859199, 1130525, 1952725, 4295995, 21479975]

約数ペア:

[(1, 21479975), (5, 4295995), (11, 1952725), (19, 1130525), (25, 859199), (55, 390545), (95, 226105), (209, 102775), (275, 78109), (475, 45221), (1045, 20555), (4111, 5225)]