64356400

素因数分解:

$2^4\times 5^2\times {\mathrm{251}}^1\times {\mathrm{641}}^1$

素因数の和:910

約数の個数: 60

約数和(自身を含む): 155474424

約数和(自身を除く): 91118024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 251, 400, 502, 641, 1004, 1255, 1282, 2008, 2510, 2564, 3205, 4016, 5020, 5128, 6275, 6410, 10040, 10256, 12550, 12820, 16025, 20080, 25100, 25640, 32050, 50200, 51280, 64100, 100400, 128200, 160891, 256400, 321782, 643564, 804455, 1287128, 1608910, 2574256, 3217820, 4022275, 6435640, 8044550, 12871280, 16089100, 32178200, 64356400]

約数ペア:

[(1, 64356400), (2, 32178200), (4, 16089100), (5, 12871280), (8, 8044550), (10, 6435640), (16, 4022275), (20, 3217820), (25, 2574256), (40, 1608910), (50, 1287128), (80, 804455), (100, 643564), (200, 321782), (251, 256400), (400, 160891), (502, 128200), (641, 100400), (1004, 64100), (1255, 51280), (1282, 50200), (2008, 32050), (2510, 25640), (2564, 25100), (3205, 20080), (4016, 16025), (5020, 12820), (5128, 12550), (6275, 10256), (6410, 10040)]