164530840

素因数分解:

$2^3\times 5^1\times {\mathrm{643}}^1\times {\mathrm{6397}}^1$

素因数の和:7051

約数の個数: 32

約数和(自身を含む): 370828080

約数和(自身を除く): 206297240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 643, 1286, 2572, 3215, 5144, 6397, 6430, 12794, 12860, 25588, 25720, 31985, 51176, 63970, 127940, 255880, 4113271, 8226542, 16453084, 20566355, 32906168, 41132710, 82265420, 164530840]

約数ペア:

[(1, 164530840), (2, 82265420), (4, 41132710), (5, 32906168), (8, 20566355), (10, 16453084), (20, 8226542), (40, 4113271), (643, 255880), (1286, 127940), (2572, 63970), (3215, 51176), (5144, 31985), (6397, 25720), (6430, 25588), (12794, 12860)]