21510710

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{337}}^1\times {\mathrm{491}}^1$

素因数の和:848

約数の個数: 32

約数和(自身を含む): 41906592

約数和(自身を除く): 20395882

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 337, 491, 674, 982, 1685, 2455, 3370, 4381, 4910, 6383, 8762, 12766, 21905, 31915, 43810, 63830, 165467, 330934, 827335, 1654670, 2151071, 4302142, 10755355, 21510710]

約数ペア:

[(1, 21510710), (2, 10755355), (5, 4302142), (10, 2151071), (13, 1654670), (26, 827335), (65, 330934), (130, 165467), (337, 63830), (491, 43810), (674, 31915), (982, 21905), (1685, 12766), (2455, 8762), (3370, 6383), (4381, 4910)]