20491936

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{271}}^1$

素因数の和:437

約数の個数: 48

約数和(自身を含む): 43182720

約数和(自身を除く): 22690784

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 68, 136, 139, 271, 272, 278, 542, 544, 556, 1084, 1112, 2168, 2224, 2363, 4336, 4448, 4607, 4726, 8672, 9214, 9452, 18428, 18904, 36856, 37669, 37808, 73712, 75338, 75616, 147424, 150676, 301352, 602704, 640373, 1205408, 1280746, 2561492, 5122984, 10245968, 20491936]

約数ペア:

[(1, 20491936), (2, 10245968), (4, 5122984), (8, 2561492), (16, 1280746), (17, 1205408), (32, 640373), (34, 602704), (68, 301352), (136, 150676), (139, 147424), (271, 75616), (272, 75338), (278, 73712), (542, 37808), (544, 37669), (556, 36856), (1084, 18904), (1112, 18428), (2168, 9452), (2224, 9214), (2363, 8672), (4336, 4726), (4448, 4607)]