19777904

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{281}}^1$

素因数の和:425

約数の個数: 40

約数和(自身を含む): 39653712

約数和(自身を除く): 19875808

約数列:

[1, 2, 4, 8, 16, 53, 83, 106, 166, 212, 281, 332, 424, 562, 664, 848, 1124, 1328, 2248, 4399, 4496, 8798, 14893, 17596, 23323, 29786, 35192, 46646, 59572, 70384, 93292, 119144, 186584, 238288, 373168, 1236119, 2472238, 4944476, 9888952, 19777904]

約数ペア:

[(1, 19777904), (2, 9888952), (4, 4944476), (8, 2472238), (16, 1236119), (53, 373168), (83, 238288), (106, 186584), (166, 119144), (212, 93292), (281, 70384), (332, 59572), (424, 46646), (562, 35192), (664, 29786), (848, 23323), (1124, 17596), (1328, 14893), (2248, 8798), (4399, 4496)]