81891765

素因数分解:

$3^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1\times {\mathrm{257}}^1$

素因数の和:438

約数の個数: 48

約数和(自身を含む): 145939248

約数和(自身を除く): 64047483

約数列:

[1, 3, 5, 9, 15, 45, 73, 97, 219, 257, 291, 365, 485, 657, 771, 873, 1095, 1285, 1455, 2313, 3285, 3855, 4365, 7081, 11565, 18761, 21243, 24929, 35405, 56283, 63729, 74787, 93805, 106215, 124645, 168849, 224361, 281415, 318645, 373935, 844245, 1121805, 1819817, 5459451, 9099085, 16378353, 27297255, 81891765]

約数ペア:

[(1, 81891765), (3, 27297255), (5, 16378353), (9, 9099085), (15, 5459451), (45, 1819817), (73, 1121805), (97, 844245), (219, 373935), (257, 318645), (291, 281415), (365, 224361), (485, 168849), (657, 124645), (771, 106215), (873, 93805), (1095, 74787), (1285, 63729), (1455, 56283), (2313, 35405), (3285, 24929), (3855, 21243), (4365, 18761), (7081, 11565)]