21404864

素因数分解:

$2^6\times {\mathrm{13}}^2\times {\mathrm{1979}}^1$

素因数の和:2017

約数の個数: 42

約数和(自身を含む): 46017180

約数和(自身を除く): 24612316

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 169, 208, 338, 416, 676, 832, 1352, 1979, 2704, 3958, 5408, 7916, 10816, 15832, 25727, 31664, 51454, 63328, 102908, 126656, 205816, 334451, 411632, 668902, 823264, 1337804, 1646528, 2675608, 5351216, 10702432, 21404864]

約数ペア:

[(1, 21404864), (2, 10702432), (4, 5351216), (8, 2675608), (13, 1646528), (16, 1337804), (26, 823264), (32, 668902), (52, 411632), (64, 334451), (104, 205816), (169, 126656), (208, 102908), (338, 63328), (416, 51454), (676, 31664), (832, 25727), (1352, 15832), (1979, 10816), (2704, 7916), (3958, 5408)]