20578688

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{149}}^1$

素因数の和:259

約数の個数: 64

約数和(自身を含む): 44982000

約数和(自身を除く): 24403312

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 83, 104, 128, 149, 166, 208, 298, 332, 416, 596, 664, 832, 1079, 1192, 1328, 1664, 1937, 2158, 2384, 2656, 3874, 4316, 4768, 5312, 7748, 8632, 9536, 10624, 12367, 15496, 17264, 19072, 24734, 30992, 34528, 49468, 61984, 69056, 98936, 123968, 138112, 160771, 197872, 247936, 321542, 395744, 643084, 791488, 1286168, 1582976, 2572336, 5144672, 10289344, 20578688]

約数ペア:

[(1, 20578688), (2, 10289344), (4, 5144672), (8, 2572336), (13, 1582976), (16, 1286168), (26, 791488), (32, 643084), (52, 395744), (64, 321542), (83, 247936), (104, 197872), (128, 160771), (149, 138112), (166, 123968), (208, 98936), (298, 69056), (332, 61984), (416, 49468), (596, 34528), (664, 30992), (832, 24734), (1079, 19072), (1192, 17264), (1328, 15496), (1664, 12367), (1937, 10624), (2158, 9536), (2384, 8632), (2656, 7748), (3874, 5312), (4316, 4768)]