256615900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{1031}}^1$

素因数の和:1195

約数の個数: 72

約数和(自身を含む): 591212160

約数和(自身を除く): 334596260

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 131, 190, 262, 380, 475, 524, 655, 950, 1031, 1310, 1900, 2062, 2489, 2620, 3275, 4124, 4978, 5155, 6550, 9956, 10310, 12445, 13100, 19589, 20620, 24890, 25775, 39178, 49780, 51550, 62225, 78356, 97945, 103100, 124450, 135061, 195890, 248900, 270122, 391780, 489725, 540244, 675305, 979450, 1350610, 1958900, 2566159, 2701220, 3376525, 5132318, 6753050, 10264636, 12830795, 13506100, 25661590, 51323180, 64153975, 128307950, 256615900]

約数ペア:

[(1, 256615900), (2, 128307950), (4, 64153975), (5, 51323180), (10, 25661590), (19, 13506100), (20, 12830795), (25, 10264636), (38, 6753050), (50, 5132318), (76, 3376525), (95, 2701220), (100, 2566159), (131, 1958900), (190, 1350610), (262, 979450), (380, 675305), (475, 540244), (524, 489725), (655, 391780), (950, 270122), (1031, 248900), (1310, 195890), (1900, 135061), (2062, 124450), (2489, 103100), (2620, 97945), (3275, 78356), (4124, 62225), (4978, 51550), (5155, 49780), (6550, 39178), (9956, 25775), (10310, 24890), (12445, 20620), (13100, 19589)]