21438040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41227}}^1$

素因数の和:41251

約数の個数: 32

約数和(自身を含む): 51947280

約数和(自身を除く): 30509240

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 41227, 82454, 164908, 206135, 329816, 412270, 535951, 824540, 1071902, 1649080, 2143804, 2679755, 4287608, 5359510, 10719020, 21438040]

約数ペア:

[(1, 21438040), (2, 10719020), (4, 5359510), (5, 4287608), (8, 2679755), (10, 2143804), (13, 1649080), (20, 1071902), (26, 824540), (40, 535951), (52, 412270), (65, 329816), (104, 206135), (130, 164908), (260, 82454), (520, 41227)]