257512521

素因数分解:

$3^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{307}}^1\times {\mathrm{677}}^1$

素因数の和:1053

約数の個数: 32

約数和(自身を含む): 400942080

約数和(自身を除く): 143429559

約数列:

[1, 3, 7, 21, 59, 177, 307, 413, 677, 921, 1239, 2031, 2149, 4739, 6447, 14217, 18113, 39943, 54339, 119829, 126791, 207839, 279601, 380373, 623517, 838803, 1454873, 4364619, 12262501, 36787503, 85837507, 257512521]

約数ペア:

[(1, 257512521), (3, 85837507), (7, 36787503), (21, 12262501), (59, 4364619), (177, 1454873), (307, 838803), (413, 623517), (677, 380373), (921, 279601), (1239, 207839), (2031, 126791), (2149, 119829), (4739, 54339), (6447, 39943), (14217, 18113)]