19970871

素因数分解:

$3^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1\times {\mathrm{389}}^1$

素因数の和:658

約数の個数: 16

約数和(自身を含む): 27112800

約数和(自身を除く): 7141929

約数列:

[1, 3, 109, 157, 327, 389, 471, 1167, 17113, 42401, 51339, 61073, 127203, 183219, 6656957, 19970871]

約数ペア:

[(1, 19970871), (3, 6656957), (109, 183219), (157, 127203), (327, 61073), (389, 51339), (471, 42401), (1167, 17113)]