128508725

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{173}}^1\times {\mathrm{691}}^1$

素因数の和:917

約数の個数: 24

約数和(自身を含む): 164236512

約数和(自身を除く): 35727787

約数列:

[1, 5, 25, 43, 173, 215, 691, 865, 1075, 3455, 4325, 7439, 17275, 29713, 37195, 119543, 148565, 185975, 597715, 742825, 2988575, 5140349, 25701745, 128508725]

約数ペア:

[(1, 128508725), (5, 25701745), (25, 5140349), (43, 2988575), (173, 742825), (215, 597715), (691, 185975), (865, 148565), (1075, 119543), (3455, 37195), (4325, 29713), (7439, 17275)]