131931280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{126857}}^1$

素因数の和:126883

約数の個数: 40

約数和(自身を含む): 330338232

約数和(自身を除く): 198406952

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 126857, 253714, 507428, 634285, 1014856, 1268570, 1649141, 2029712, 2537140, 3298282, 5074280, 6596564, 8245705, 10148560, 13193128, 16491410, 26386256, 32982820, 65965640, 131931280]

約数ペア:

[(1, 131931280), (2, 65965640), (4, 32982820), (5, 26386256), (8, 16491410), (10, 13193128), (13, 10148560), (16, 8245705), (20, 6596564), (26, 5074280), (40, 3298282), (52, 2537140), (65, 2029712), (80, 1649141), (104, 1268570), (130, 1014856), (208, 634285), (260, 507428), (520, 253714), (1040, 126857)]