256398520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{271}}^1$

素因数の和:429

約数の個数: 128

約数和(自身を含む): 689356800

約数和(自身を除く): 432958280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 109, 124, 140, 155, 217, 218, 248, 271, 280, 310, 434, 436, 542, 545, 620, 763, 868, 872, 1084, 1085, 1090, 1240, 1355, 1526, 1736, 1897, 2168, 2170, 2180, 2710, 3052, 3379, 3794, 3815, 4340, 4360, 5420, 6104, 6758, 7588, 7630, 8401, 8680, 9485, 10840, 13516, 15176, 15260, 16802, 16895, 18970, 23653, 27032, 29539, 30520, 33604, 33790, 37940, 42005, 47306, 58807, 59078, 67208, 67580, 75880, 84010, 94612, 117614, 118156, 118265, 135160, 147695, 168020, 189224, 206773, 235228, 236312, 236530, 294035, 295390, 336040, 413546, 470456, 473060, 588070, 590780, 827092, 915709, 946120, 1033865, 1176140, 1181560, 1654184, 1831418, 2067730, 2352280, 3662836, 4135460, 4578545, 6409963, 7325672, 8270920, 9157090, 12819926, 18314180, 25639852, 32049815, 36628360, 51279704, 64099630, 128199260, 256398520]

約数ペア:

[(1, 256398520), (2, 128199260), (4, 64099630), (5, 51279704), (7, 36628360), (8, 32049815), (10, 25639852), (14, 18314180), (20, 12819926), (28, 9157090), (31, 8270920), (35, 7325672), (40, 6409963), (56, 4578545), (62, 4135460), (70, 3662836), (109, 2352280), (124, 2067730), (140, 1831418), (155, 1654184), (217, 1181560), (218, 1176140), (248, 1033865), (271, 946120), (280, 915709), (310, 827092), (434, 590780), (436, 588070), (542, 473060), (545, 470456), (620, 413546), (763, 336040), (868, 295390), (872, 294035), (1084, 236530), (1085, 236312), (1090, 235228), (1240, 206773), (1355, 189224), (1526, 168020), (1736, 147695), (1897, 135160), (2168, 118265), (2170, 118156), (2180, 117614), (2710, 94612), (3052, 84010), (3379, 75880), (3794, 67580), (3815, 67208), (4340, 59078), (4360, 58807), (5420, 47306), (6104, 42005), (6758, 37940), (7588, 33790), (7630, 33604), (8401, 30520), (8680, 29539), (9485, 27032), (10840, 23653), (13516, 18970), (15176, 16895), (15260, 16802)]