2591290

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{643}}^1$

素因数の和:694

約数の個数: 32

約数和(自身を含む): 5193216

約数和(自身を除く): 2601926

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 643, 806, 1286, 2015, 3215, 4030, 6430, 8359, 16718, 19933, 39866, 41795, 83590, 99665, 199330, 259129, 518258, 1295645, 2591290]

約数ペア:

[(1, 2591290), (2, 1295645), (5, 518258), (10, 259129), (13, 199330), (26, 99665), (31, 83590), (62, 41795), (65, 39866), (130, 19933), (155, 16718), (310, 8359), (403, 6430), (643, 4030), (806, 3215), (1286, 2015)]