312255

素因数分解:

$3^5\times 5^1\times {\mathrm{257}}^1$

素因数の和:277

約数の個数: 24

約数和(自身を含む): 563472

約数和(自身を除く): 251217

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 257, 405, 771, 1215, 1285, 2313, 3855, 6939, 11565, 20817, 34695, 62451, 104085, 312255]

約数ペア:

[(1, 312255), (3, 104085), (5, 62451), (9, 34695), (15, 20817), (27, 11565), (45, 6939), (81, 3855), (135, 2313), (243, 1285), (257, 1215), (405, 771)]