21045232

素因数分解:

$2^4\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:258

約数の個数: 60

約数和(自身を含む): 45429384

約数和(自身を除く): 24384152

約数列:

[1, 2, 4, 8, 13, 16, 26, 43, 52, 86, 104, 169, 172, 181, 208, 338, 344, 362, 559, 676, 688, 724, 1118, 1352, 1448, 2236, 2353, 2704, 2896, 4472, 4706, 7267, 7783, 8944, 9412, 14534, 15566, 18824, 29068, 30589, 31132, 37648, 58136, 61178, 62264, 101179, 116272, 122356, 124528, 202358, 244712, 404716, 489424, 809432, 1315327, 1618864, 2630654, 5261308, 10522616, 21045232]

約数ペア:

[(1, 21045232), (2, 10522616), (4, 5261308), (8, 2630654), (13, 1618864), (16, 1315327), (26, 809432), (43, 489424), (52, 404716), (86, 244712), (104, 202358), (169, 124528), (172, 122356), (181, 116272), (208, 101179), (338, 62264), (344, 61178), (362, 58136), (559, 37648), (676, 31132), (688, 30589), (724, 29068), (1118, 18824), (1352, 15566), (1448, 14534), (2236, 9412), (2353, 8944), (2704, 7783), (2896, 7267), (4472, 4706)]