20988736

素因数分解:

$2^6\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:263

約数の個数: 56

約数和(自身を含む): 43891200

約数和(自身を除く): 22902464

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 71, 124, 142, 149, 248, 284, 298, 496, 568, 596, 992, 1136, 1192, 1984, 2201, 2272, 2384, 4402, 4544, 4619, 4768, 8804, 9238, 9536, 10579, 17608, 18476, 21158, 35216, 36952, 42316, 70432, 73904, 84632, 140864, 147808, 169264, 295616, 327949, 338528, 655898, 677056, 1311796, 2623592, 5247184, 10494368, 20988736]

約数ペア:

[(1, 20988736), (2, 10494368), (4, 5247184), (8, 2623592), (16, 1311796), (31, 677056), (32, 655898), (62, 338528), (64, 327949), (71, 295616), (124, 169264), (142, 147808), (149, 140864), (248, 84632), (284, 73904), (298, 70432), (496, 42316), (568, 36952), (596, 35216), (992, 21158), (1136, 18476), (1192, 17608), (1984, 10579), (2201, 9536), (2272, 9238), (2384, 8804), (4402, 4768), (4544, 4619)]