256614280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{15919}}^1$

素因数の和:15974

約数の個数: 64

約数和(自身を含む): 641894400

約数和(自身を除く): 385280120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 620, 806, 1240, 1612, 2015, 3224, 4030, 8060, 15919, 16120, 31838, 63676, 79595, 127352, 159190, 206947, 318380, 413894, 493489, 636760, 827788, 986978, 1034735, 1655576, 1973956, 2069470, 2467445, 3947912, 4138940, 4934890, 6415357, 8277880, 9869780, 12830714, 19739560, 25661428, 32076785, 51322856, 64153570, 128307140, 256614280]

約数ペア:

[(1, 256614280), (2, 128307140), (4, 64153570), (5, 51322856), (8, 32076785), (10, 25661428), (13, 19739560), (20, 12830714), (26, 9869780), (31, 8277880), (40, 6415357), (52, 4934890), (62, 4138940), (65, 3947912), (104, 2467445), (124, 2069470), (130, 1973956), (155, 1655576), (248, 1034735), (260, 986978), (310, 827788), (403, 636760), (520, 493489), (620, 413894), (806, 318380), (1240, 206947), (1612, 159190), (2015, 127352), (3224, 79595), (4030, 63676), (8060, 31838), (15919, 16120)]