20639776

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{409}}^1$

素因数の和:521

約数の個数: 48

約数和(自身を含む): 43394400

約数和(自身を除く): 22754624

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 76, 83, 152, 166, 304, 332, 409, 608, 664, 818, 1328, 1577, 1636, 2656, 3154, 3272, 6308, 6544, 7771, 12616, 13088, 15542, 25232, 31084, 33947, 50464, 62168, 67894, 124336, 135788, 248672, 271576, 543152, 644993, 1086304, 1289986, 2579972, 5159944, 10319888, 20639776]

約数ペア:

[(1, 20639776), (2, 10319888), (4, 5159944), (8, 2579972), (16, 1289986), (19, 1086304), (32, 644993), (38, 543152), (76, 271576), (83, 248672), (152, 135788), (166, 124336), (304, 67894), (332, 62168), (409, 50464), (608, 33947), (664, 31084), (818, 25232), (1328, 15542), (1577, 13088), (1636, 12616), (2656, 7771), (3154, 6544), (3272, 6308)]