21647210

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12809}}^1$

素因数の和:12842

約数の個数: 24

約数和(自身を含む): 42196140

約数和(自身を除く): 20548930

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12809, 25618, 64045, 128090, 166517, 333034, 832585, 1665170, 2164721, 4329442, 10823605, 21647210]

約数ペア:

[(1, 21647210), (2, 10823605), (5, 4329442), (10, 2164721), (13, 1665170), (26, 832585), (65, 333034), (130, 166517), (169, 128090), (338, 64045), (845, 25618), (1690, 12809)]