256503920

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{293}}^1\times {\mathrm{353}}^1$

素因数の和:690

約数の個数: 80

約数和(自身を含む): 619460352

約数和(自身を除く): 362956432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 293, 310, 353, 496, 586, 620, 706, 1172, 1240, 1412, 1465, 1765, 2344, 2480, 2824, 2930, 3530, 4688, 5648, 5860, 7060, 9083, 10943, 11720, 14120, 18166, 21886, 23440, 28240, 36332, 43772, 45415, 54715, 72664, 87544, 90830, 103429, 109430, 145328, 175088, 181660, 206858, 218860, 363320, 413716, 437720, 517145, 726640, 827432, 875440, 1034290, 1654864, 2068580, 3206299, 4137160, 6412598, 8274320, 12825196, 16031495, 25650392, 32062990, 51300784, 64125980, 128251960, 256503920]

約数ペア:

[(1, 256503920), (2, 128251960), (4, 64125980), (5, 51300784), (8, 32062990), (10, 25650392), (16, 16031495), (20, 12825196), (31, 8274320), (40, 6412598), (62, 4137160), (80, 3206299), (124, 2068580), (155, 1654864), (248, 1034290), (293, 875440), (310, 827432), (353, 726640), (496, 517145), (586, 437720), (620, 413716), (706, 363320), (1172, 218860), (1240, 206858), (1412, 181660), (1465, 175088), (1765, 145328), (2344, 109430), (2480, 103429), (2824, 90830), (2930, 87544), (3530, 72664), (4688, 54715), (5648, 45415), (5860, 43772), (7060, 36332), (9083, 28240), (10943, 23440), (11720, 21886), (14120, 18166)]