19997012

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{17419}}^1$

素因数の和:17471

約数の個数: 24

約数和(自身を含む): 40971840

約数和(自身を除く): 20974828

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 164, 287, 574, 1148, 17419, 34838, 69676, 121933, 243866, 487732, 714179, 1428358, 2856716, 4999253, 9998506, 19997012]

約数ペア:

[(1, 19997012), (2, 9998506), (4, 4999253), (7, 2856716), (14, 1428358), (28, 714179), (41, 487732), (82, 243866), (164, 121933), (287, 69676), (574, 34838), (1148, 17419)]