778815

素因数分解:

$3^5\times 5^1\times {\mathrm{641}}^1$

素因数の和:661

約数の個数: 24

約数和(自身を含む): 1402128

約数和(自身を除く): 623313

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 641, 1215, 1923, 3205, 5769, 9615, 17307, 28845, 51921, 86535, 155763, 259605, 778815]

約数ペア:

[(1, 778815), (3, 259605), (5, 155763), (9, 86535), (15, 51921), (27, 28845), (45, 17307), (81, 9615), (135, 5769), (243, 3205), (405, 1923), (641, 1215)]