21053008

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{479}}^1$

素因数の和:595

約数の個数: 40

約数和(自身を含む): 42497280

約数和(自身を除く): 21444272

約数列:

[1, 2, 4, 8, 16, 41, 67, 82, 134, 164, 268, 328, 479, 536, 656, 958, 1072, 1916, 2747, 3832, 5494, 7664, 10988, 19639, 21976, 32093, 39278, 43952, 64186, 78556, 128372, 157112, 256744, 314224, 513488, 1315813, 2631626, 5263252, 10526504, 21053008]

約数ペア:

[(1, 21053008), (2, 10526504), (4, 5263252), (8, 2631626), (16, 1315813), (41, 513488), (67, 314224), (82, 256744), (134, 157112), (164, 128372), (268, 78556), (328, 64186), (479, 43952), (536, 39278), (656, 32093), (958, 21976), (1072, 19639), (1916, 10988), (2747, 7664), (3832, 5494)]