7999965

素因数分解:

$3^4\times 5^1\times {\mathrm{19753}}^1$

素因数の和:19770

約数の個数: 20

約数和(自身を含む): 14341404

約数和(自身を除く): 6341439

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 19753, 59259, 98765, 177777, 296295, 533331, 888885, 1599993, 2666655, 7999965]

約数ペア:

[(1, 7999965), (3, 2666655), (5, 1599993), (9, 888885), (15, 533331), (27, 296295), (45, 177777), (81, 98765), (135, 59259), (405, 19753)]