128783960

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{20507}}^1$

素因数の和:20675

約数の個数: 32

約数和(自身を含む): 291623760

約数和(自身を除く): 162839800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 6280, 20507, 41014, 82028, 102535, 164056, 205070, 410140, 820280, 3219599, 6439198, 12878396, 16097995, 25756792, 32195990, 64391980, 128783960]

約数ペア:

[(1, 128783960), (2, 64391980), (4, 32195990), (5, 25756792), (8, 16097995), (10, 12878396), (20, 6439198), (40, 3219599), (157, 820280), (314, 410140), (628, 205070), (785, 164056), (1256, 102535), (1570, 82028), (3140, 41014), (6280, 20507)]