20687576

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{181}}^1$

素因数の和:364

約数の個数: 64

約数和(自身を含む): 48310080

約数和(自身を除く): 27622504

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 157, 181, 182, 314, 362, 364, 628, 724, 728, 1099, 1256, 1267, 1448, 2041, 2198, 2353, 2534, 4082, 4396, 4706, 5068, 8164, 8792, 9412, 10136, 14287, 16328, 16471, 18824, 28417, 28574, 32942, 56834, 57148, 65884, 113668, 114296, 131768, 198919, 227336, 369421, 397838, 738842, 795676, 1477684, 1591352, 2585947, 2955368, 5171894, 10343788, 20687576]

約数ペア:

[(1, 20687576), (2, 10343788), (4, 5171894), (7, 2955368), (8, 2585947), (13, 1591352), (14, 1477684), (26, 795676), (28, 738842), (52, 397838), (56, 369421), (91, 227336), (104, 198919), (157, 131768), (181, 114296), (182, 113668), (314, 65884), (362, 57148), (364, 56834), (628, 32942), (724, 28574), (728, 28417), (1099, 18824), (1256, 16471), (1267, 16328), (1448, 14287), (2041, 10136), (2198, 9412), (2353, 8792), (2534, 8164), (4082, 5068), (4396, 4706)]