20492768

素因数分解:

$2^5\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{281}}^1$

素因数の和:387

約数の個数: 48

約数和(自身を含む): 42212016

約数和(自身を除く): 21719248

約数列:

[1, 2, 4, 8, 16, 32, 43, 53, 86, 106, 172, 212, 281, 344, 424, 562, 688, 848, 1124, 1376, 1696, 2248, 2279, 4496, 4558, 8992, 9116, 12083, 14893, 18232, 24166, 29786, 36464, 48332, 59572, 72928, 96664, 119144, 193328, 238288, 386656, 476576, 640399, 1280798, 2561596, 5123192, 10246384, 20492768]

約数ペア:

[(1, 20492768), (2, 10246384), (4, 5123192), (8, 2561596), (16, 1280798), (32, 640399), (43, 476576), (53, 386656), (86, 238288), (106, 193328), (172, 119144), (212, 96664), (281, 72928), (344, 59572), (424, 48332), (562, 36464), (688, 29786), (848, 24166), (1124, 18232), (1376, 14893), (1696, 12083), (2248, 9116), (2279, 8992), (4496, 4558)]