644736960

素因数分解:

$2^6\times 3^2\times 5^1\times 7^1\times {\mathrm{31981}}^1$

素因数の和:32011

約数の個数: 168

約数和(自身を含む): 2534509536

約数和(自身を除く): 1889772576

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 36, 40, 42, 45, 48, 56, 60, 63, 64, 70, 72, 80, 84, 90, 96, 105, 112, 120, 126, 140, 144, 160, 168, 180, 192, 210, 224, 240, 252, 280, 288, 315, 320, 336, 360, 420, 448, 480, 504, 560, 576, 630, 672, 720, 840, 960, 1008, 1120, 1260, 1344, 1440, 1680, 2016, 2240, 2520, 2880, 3360, 4032, 5040, 6720, 10080, 20160, 31981, 63962, 95943, 127924, 159905, 191886, 223867, 255848, 287829, 319810, 383772, 447734, 479715, 511696, 575658, 639620, 671601, 767544, 895468, 959430, 1023392, 1119335, 1151316, 1279240, 1343202, 1439145, 1535088, 1790936, 1918860, 2014803, 2046784, 2238670, 2302632, 2558480, 2686404, 2878290, 3070176, 3358005, 3581872, 3837720, 4029606, 4477340, 4605264, 5116960, 5372808, 5756580, 6140352, 6716010, 7163744, 7675440, 8059212, 8954680, 9210528, 10074015, 10233920, 10745616, 11513160, 13432020, 14327488, 15350880, 16118424, 17909360, 18421056, 20148030, 21491232, 23026320, 26864040, 30701760, 32236848, 35818720, 40296060, 42982464, 46052640, 53728080, 64473696, 71637440, 80592120, 92105280, 107456160, 128947392, 161184240, 214912320, 322368480, 644736960]

約数ペア:

[(1, 644736960), (2, 322368480), (3, 214912320), (4, 161184240), (5, 128947392), (6, 107456160), (7, 92105280), (8, 80592120), (9, 71637440), (10, 64473696), (12, 53728080), (14, 46052640), (15, 42982464), (16, 40296060), (18, 35818720), (20, 32236848), (21, 30701760), (24, 26864040), (28, 23026320), (30, 21491232), (32, 20148030), (35, 18421056), (36, 17909360), (40, 16118424), (42, 15350880), (45, 14327488), (48, 13432020), (56, 11513160), (60, 10745616), (63, 10233920), (64, 10074015), (70, 9210528), (72, 8954680), (80, 8059212), (84, 7675440), (90, 7163744), (96, 6716010), (105, 6140352), (112, 5756580), (120, 5372808), (126, 5116960), (140, 4605264), (144, 4477340), (160, 4029606), (168, 3837720), (180, 3581872), (192, 3358005), (210, 3070176), (224, 2878290), (240, 2686404), (252, 2558480), (280, 2302632), (288, 2238670), (315, 2046784), (320, 2014803), (336, 1918860), (360, 1790936), (420, 1535088), (448, 1439145), (480, 1343202), (504, 1279240), (560, 1151316), (576, 1119335), (630, 1023392), (672, 959430), (720, 895468), (840, 767544), (960, 671601), (1008, 639620), (1120, 575658), (1260, 511696), (1344, 479715), (1440, 447734), (1680, 383772), (2016, 319810), (2240, 287829), (2520, 255848), (2880, 223867), (3360, 191886), (4032, 159905), (5040, 127924), (6720, 95943), (10080, 63962), (20160, 31981)]