20344688

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:274

約数の個数: 80

約数和(自身を含む): 49371840

約数和(自身を除く): 29027152

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 89, 91, 104, 112, 157, 178, 182, 208, 314, 356, 364, 623, 628, 712, 728, 1099, 1157, 1246, 1256, 1424, 1456, 2041, 2198, 2314, 2492, 2512, 4082, 4396, 4628, 4984, 8099, 8164, 8792, 9256, 9968, 13973, 14287, 16198, 16328, 17584, 18512, 27946, 28574, 32396, 32656, 55892, 57148, 64792, 97811, 111784, 114296, 129584, 181649, 195622, 223568, 228592, 363298, 391244, 726596, 782488, 1271543, 1453192, 1564976, 2543086, 2906384, 5086172, 10172344, 20344688]

約数ペア:

[(1, 20344688), (2, 10172344), (4, 5086172), (7, 2906384), (8, 2543086), (13, 1564976), (14, 1453192), (16, 1271543), (26, 782488), (28, 726596), (52, 391244), (56, 363298), (89, 228592), (91, 223568), (104, 195622), (112, 181649), (157, 129584), (178, 114296), (182, 111784), (208, 97811), (314, 64792), (356, 57148), (364, 55892), (623, 32656), (628, 32396), (712, 28574), (728, 27946), (1099, 18512), (1157, 17584), (1246, 16328), (1256, 16198), (1424, 14287), (1456, 13973), (2041, 9968), (2198, 9256), (2314, 8792), (2492, 8164), (2512, 8099), (4082, 4984), (4396, 4628)]