19991235

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{7127}}^1$

素因数の和:7163

約数の個数: 32

約数和(自身を含む): 36951552

約数和(自身を除く): 16960317

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 85, 165, 187, 255, 561, 935, 2805, 7127, 21381, 35635, 78397, 106905, 121159, 235191, 363477, 391985, 605795, 1175955, 1332749, 1817385, 3998247, 6663745, 19991235]

約数ペア:

[(1, 19991235), (3, 6663745), (5, 3998247), (11, 1817385), (15, 1332749), (17, 1175955), (33, 605795), (51, 391985), (55, 363477), (85, 235191), (165, 121159), (187, 106905), (255, 78397), (561, 35635), (935, 21381), (2805, 7127)]