20485712

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{661}}^1$

素因数の和:831

約数の個数: 40

約数和(自身を含む): 43096200

約数和(自身を除く): 22610488

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 149, 208, 298, 596, 661, 1192, 1322, 1937, 2384, 2644, 3874, 5288, 7748, 8593, 10576, 15496, 17186, 30992, 34372, 68744, 98489, 137488, 196978, 393956, 787912, 1280357, 1575824, 2560714, 5121428, 10242856, 20485712]

約数ペア:

[(1, 20485712), (2, 10242856), (4, 5121428), (8, 2560714), (13, 1575824), (16, 1280357), (26, 787912), (52, 393956), (104, 196978), (149, 137488), (208, 98489), (298, 68744), (596, 34372), (661, 30992), (1192, 17186), (1322, 15496), (1937, 10576), (2384, 8593), (2644, 7748), (3874, 5288)]