257533120

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1997}}^1$

素因数の和:2058

約数の個数: 112

約数和(自身を含む): 682069248

約数和(自身を除く): 424536128

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 32, 40, 52, 62, 64, 65, 80, 104, 124, 130, 155, 160, 208, 248, 260, 310, 320, 403, 416, 496, 520, 620, 806, 832, 992, 1040, 1240, 1612, 1984, 1997, 2015, 2080, 2480, 3224, 3994, 4030, 4160, 4960, 6448, 7988, 8060, 9920, 9985, 12896, 15976, 16120, 19970, 25792, 25961, 31952, 32240, 39940, 51922, 61907, 63904, 64480, 79880, 103844, 123814, 127808, 128960, 129805, 159760, 207688, 247628, 259610, 309535, 319520, 415376, 495256, 519220, 619070, 639040, 804791, 830752, 990512, 1038440, 1238140, 1609582, 1661504, 1981024, 2076880, 2476280, 3219164, 3962048, 4023955, 4153760, 4952560, 6438328, 8047910, 8307520, 9905120, 12876656, 16095820, 19810240, 25753312, 32191640, 51506624, 64383280, 128766560, 257533120]

約数ペア:

[(1, 257533120), (2, 128766560), (4, 64383280), (5, 51506624), (8, 32191640), (10, 25753312), (13, 19810240), (16, 16095820), (20, 12876656), (26, 9905120), (31, 8307520), (32, 8047910), (40, 6438328), (52, 4952560), (62, 4153760), (64, 4023955), (65, 3962048), (80, 3219164), (104, 2476280), (124, 2076880), (130, 1981024), (155, 1661504), (160, 1609582), (208, 1238140), (248, 1038440), (260, 990512), (310, 830752), (320, 804791), (403, 639040), (416, 619070), (496, 519220), (520, 495256), (620, 415376), (806, 319520), (832, 309535), (992, 259610), (1040, 247628), (1240, 207688), (1612, 159760), (1984, 129805), (1997, 128960), (2015, 127808), (2080, 123814), (2480, 103844), (3224, 79880), (3994, 64480), (4030, 63904), (4160, 61907), (4960, 51922), (6448, 39940), (7988, 32240), (8060, 31952), (9920, 25961), (9985, 25792), (12896, 19970), (15976, 16120)]