21591778

素因数分解:

$2^1\times {\mathrm{13}}^2\times {\mathrm{127}}^1\times {\mathrm{503}}^1$

素因数の和:658

約数の個数: 24

約数和(自身を含む): 35417088

約数和(自身を除く): 13825310

約数列:

[1, 2, 13, 26, 127, 169, 254, 338, 503, 1006, 1651, 3302, 6539, 13078, 21463, 42926, 63881, 85007, 127762, 170014, 830453, 1660906, 10795889, 21591778]

約数ペア:

[(1, 21591778), (2, 10795889), (13, 1660906), (26, 830453), (127, 170014), (169, 127762), (254, 85007), (338, 63881), (503, 42926), (1006, 21463), (1651, 13078), (3302, 6539)]