647501912

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1\times {\mathrm{631}}^1$

素因数の和:856

約数の個数: 64

約数和(自身を含む): 1318099200

約数和(自身を除く): 670597288

約数列:

[1, 2, 4, 8, 19, 38, 43, 76, 86, 152, 157, 172, 314, 344, 628, 631, 817, 1256, 1262, 1634, 2524, 2983, 3268, 5048, 5966, 6536, 6751, 11932, 11989, 13502, 23864, 23978, 27004, 27133, 47956, 54008, 54266, 95912, 99067, 108532, 128269, 198134, 217064, 256538, 396268, 513076, 515527, 792536, 1026152, 1031054, 1882273, 2062108, 3764546, 4124216, 4259881, 7529092, 8519762, 15058184, 17039524, 34079048, 80937739, 161875478, 323750956, 647501912]

約数ペア:

[(1, 647501912), (2, 323750956), (4, 161875478), (8, 80937739), (19, 34079048), (38, 17039524), (43, 15058184), (76, 8519762), (86, 7529092), (152, 4259881), (157, 4124216), (172, 3764546), (314, 2062108), (344, 1882273), (628, 1031054), (631, 1026152), (817, 792536), (1256, 515527), (1262, 513076), (1634, 396268), (2524, 256538), (2983, 217064), (3268, 198134), (5048, 128269), (5966, 108532), (6536, 99067), (6751, 95912), (11932, 54266), (11989, 54008), (13502, 47956), (23864, 27133), (23978, 27004)]