20999769

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{52631}}^1$

素因数の和:52660

約数の個数: 16

約数和(自身を含む): 33684480

約数和(自身を除く): 12684711

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 52631, 157893, 368417, 999989, 1105251, 2999967, 6999923, 20999769]

約数ペア:

[(1, 20999769), (3, 6999923), (7, 2999967), (19, 1105251), (21, 999989), (57, 368417), (133, 157893), (399, 52631)]