640352492

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{30557}}^1$

素因数の和:30618

約数の個数: 36

約数和(自身を含む): 1252633536

約数和(自身を除く): 612281044

約数列:

[1, 2, 4, 13, 26, 31, 52, 62, 124, 169, 338, 403, 676, 806, 1612, 5239, 10478, 20956, 30557, 61114, 122228, 397241, 794482, 947267, 1588964, 1894534, 3789068, 5164133, 10328266, 12314471, 20656532, 24628942, 49257884, 160088123, 320176246, 640352492]

約数ペア:

[(1, 640352492), (2, 320176246), (4, 160088123), (13, 49257884), (26, 24628942), (31, 20656532), (52, 12314471), (62, 10328266), (124, 5164133), (169, 3789068), (338, 1894534), (403, 1588964), (676, 947267), (806, 794482), (1612, 397241), (5239, 122228), (10478, 61114), (20956, 30557)]