21125728

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1181}}^1$

素因数の和:1247

約数の個数: 48

約数和(自身を含む): 45871056

約数和(自身を除く): 24745328

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 43, 52, 86, 104, 172, 208, 344, 416, 559, 688, 1118, 1181, 1376, 2236, 2362, 4472, 4724, 8944, 9448, 15353, 17888, 18896, 30706, 37792, 50783, 61412, 101566, 122824, 203132, 245648, 406264, 491296, 660179, 812528, 1320358, 1625056, 2640716, 5281432, 10562864, 21125728]

約数ペア:

[(1, 21125728), (2, 10562864), (4, 5281432), (8, 2640716), (13, 1625056), (16, 1320358), (26, 812528), (32, 660179), (43, 491296), (52, 406264), (86, 245648), (104, 203132), (172, 122824), (208, 101566), (344, 61412), (416, 50783), (559, 37792), (688, 30706), (1118, 18896), (1181, 17888), (1376, 15353), (2236, 9448), (2362, 8944), (4472, 4724)]