639826064

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{647}}^1\times {\mathrm{3253}}^1$

素因数の和:3927

約数の個数: 40

約数和(自身を含む): 1307327040

約数和(自身を除く): 667500976

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 647, 1294, 2588, 3253, 5176, 6506, 10352, 12293, 13012, 24586, 26024, 49172, 52048, 61807, 98344, 123614, 196688, 247228, 494456, 988912, 2104691, 4209382, 8418764, 16837528, 33675056, 39989129, 79978258, 159956516, 319913032, 639826064]

約数ペア:

[(1, 639826064), (2, 319913032), (4, 159956516), (8, 79978258), (16, 39989129), (19, 33675056), (38, 16837528), (76, 8418764), (152, 4209382), (304, 2104691), (647, 988912), (1294, 494456), (2588, 247228), (3253, 196688), (5176, 123614), (6506, 98344), (10352, 61807), (12293, 52048), (13012, 49172), (24586, 26024)]