639465728

素因数分解:

$2^8\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{5281}}^1$

素因数の和:5351

約数の個数: 72

約数和(自身を含む): 1425125856

約数和(自身を除く): 785660128

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 43, 44, 64, 86, 88, 128, 172, 176, 256, 344, 352, 473, 688, 704, 946, 1376, 1408, 1892, 2752, 2816, 3784, 5281, 5504, 7568, 10562, 11008, 15136, 21124, 30272, 42248, 58091, 60544, 84496, 116182, 121088, 168992, 227083, 232364, 337984, 454166, 464728, 675968, 908332, 929456, 1351936, 1816664, 1858912, 2497913, 3633328, 3717824, 4995826, 7266656, 7435648, 9991652, 14533312, 14871296, 19983304, 29066624, 39966608, 58133248, 79933216, 159866432, 319732864, 639465728]

約数ペア:

[(1, 639465728), (2, 319732864), (4, 159866432), (8, 79933216), (11, 58133248), (16, 39966608), (22, 29066624), (32, 19983304), (43, 14871296), (44, 14533312), (64, 9991652), (86, 7435648), (88, 7266656), (128, 4995826), (172, 3717824), (176, 3633328), (256, 2497913), (344, 1858912), (352, 1816664), (473, 1351936), (688, 929456), (704, 908332), (946, 675968), (1376, 464728), (1408, 454166), (1892, 337984), (2752, 232364), (2816, 227083), (3784, 168992), (5281, 121088), (5504, 116182), (7568, 84496), (10562, 60544), (11008, 58091), (15136, 42248), (21124, 30272)]