20389568

素因数分解:

$2^6\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{239}}^1$

素因数の和:325

約数の個数: 56

約数和(自身を含む): 42915840

約数和(自身を除く): 22526272

約数列:

[1, 2, 4, 8, 16, 31, 32, 43, 62, 64, 86, 124, 172, 239, 248, 344, 478, 496, 688, 956, 992, 1333, 1376, 1912, 1984, 2666, 2752, 3824, 5332, 7409, 7648, 10277, 10664, 14818, 15296, 20554, 21328, 29636, 41108, 42656, 59272, 82216, 85312, 118544, 164432, 237088, 318587, 328864, 474176, 637174, 657728, 1274348, 2548696, 5097392, 10194784, 20389568]

約数ペア:

[(1, 20389568), (2, 10194784), (4, 5097392), (8, 2548696), (16, 1274348), (31, 657728), (32, 637174), (43, 474176), (62, 328864), (64, 318587), (86, 237088), (124, 164432), (172, 118544), (239, 85312), (248, 82216), (344, 59272), (478, 42656), (496, 41108), (688, 29636), (956, 21328), (992, 20554), (1333, 15296), (1376, 14818), (1912, 10664), (1984, 10277), (2666, 7648), (2752, 7409), (3824, 5332)]