20387456

素因数分解:

$2^7\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{101}}^1$

素因数の和:217

約数の個数: 64

約数和(自身を含む): 43696800

約数和(自身を除く): 23309344

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 64, 76, 83, 101, 128, 152, 166, 202, 304, 332, 404, 608, 664, 808, 1216, 1328, 1577, 1616, 1919, 2432, 2656, 3154, 3232, 3838, 5312, 6308, 6464, 7676, 8383, 10624, 12616, 12928, 15352, 16766, 25232, 30704, 33532, 50464, 61408, 67064, 100928, 122816, 134128, 159277, 201856, 245632, 268256, 318554, 536512, 637108, 1073024, 1274216, 2548432, 5096864, 10193728, 20387456]

約数ペア:

[(1, 20387456), (2, 10193728), (4, 5096864), (8, 2548432), (16, 1274216), (19, 1073024), (32, 637108), (38, 536512), (64, 318554), (76, 268256), (83, 245632), (101, 201856), (128, 159277), (152, 134128), (166, 122816), (202, 100928), (304, 67064), (332, 61408), (404, 50464), (608, 33532), (664, 30704), (808, 25232), (1216, 16766), (1328, 15352), (1577, 12928), (1616, 12616), (1919, 10624), (2432, 8383), (2656, 7676), (3154, 6464), (3232, 6308), (3838, 5312)]